Photographing optical lens assembly including eight lenses of +−+−−++−, +−++−++−, ++++−++−or +−+−+−+− refractive powers, imaging apparatus and electronic device

ABSTRACT

A photographing optical lens assembly includes eight lens elements, which are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element and an eighth lens element. Each of the eight lens elements has an object-side surface towards the object side and an image-side surface towards the image side. The first lens element has positive refractive power. The object-side surface of the fifth lens element is concave in a paraxial region thereof. The image-side surface of the sixth lens element is concave in a paraxial region thereof. The object-side surface of the seventh lens element is convex in a paraxial region thereof. The image-side surface of the eighth lens element is concave in a paraxial region thereof.

RELATED APPLICATIONS

This application claims priority to Taiwan Application Serial Number109102020, filed Jan. 20, 2020, which is herein incorporated byreference.

BACKGROUND Technical Field

The present disclosure relates to a photographing optical lens assemblyand an imaging apparatus. More particularly, the present disclosurerelates to a photographing optical lens assembly and an imagingapparatus with compact size applicable to electronic devices.

Description of Related Art

With recent technology of semiconductor process advances, performancesof image sensors are enhanced, so that the smaller pixel size can beachieved. Therefore, optical lens assemblies with high image qualityhave become an indispensable part of many modern electronics. With rapiddevelopments of technology, applications of electronic devices equippedwith optical lens assemblies increase and there is a wide variety ofrequirements for optical lens assemblies. However, in a conventionaloptical lens assembly, it is hard to balance among image quality,sensitivity, aperture size, volume or field of view. Thus, there is ademand for an optical lens assembly that meets the aforementioned needs.

SUMMARY

According to one aspect of the present disclosure, a photographingoptical lens assembly includes eight lens elements, the eight lenselements being, in order from an object side to an image side along anoptical path, a first lens element, a second lens element, a third lenselement, a fourth lens element, a fifth lens element, a sixth lenselement, a seventh lens element and an eighth lens element. Each of theeight lens elements has an object-side surface towards the object sideand an image-side surface towards the image side. The first lens elementhas positive refractive power. The object-side surface of the fifth lenselement is concave in a paraxial region thereof. The image-side surfaceof the sixth lens element is concave in a paraxial region thereof. Theobject-side surface of the seventh lens element is convex in a paraxialregion thereof. The image-side surface of the eighth lens element isconcave in a paraxial region thereof. At least one of the object-sidesurfaces and the image-side surfaces of the eight lens elements includesat least one critical point in an off-axis region thereof. When an axialdistance between the first lens element and the second lens element isT12, an axial distance between the second lens element and the thirdlens element is T23, an axial distance between the third lens elementand the fourth lens element is T34, a curvature radius of theobject-side surface of the third lens element is R5, and a curvatureradius of the image-side surface of the third lens element is R6, thefollowing conditions are satisfied: 5.5<(T12+T34)/T23; and−0.70<R5/R6<0.80.

According to another aspect of the present disclosure, a photographingoptical lens assembly includes eight lens elements, the eight lenselements being, in order from an object side to an image side along anoptical path, a first lens element, a second lens element, a third lenselement, a fourth lens element, a fifth lens element, a sixth lenselement, a seventh lens element and an eighth lens element. Each of theeight lens elements has an object-side surface towards the object sideand an image-side surface towards the image side. The first lens elementhas positive refractive power. The object-side surface of the secondlens element is convex in a paraxial region thereof. The third lenselement has positive refractive power. The image-side surface of thefifth lens element is convex in a paraxial region thereof. Theobject-side surface of the sixth lens element is convex in a paraxialregion thereof. At least one of the object-side surfaces and theimage-side surfaces of the eight lens elements includes at least onecritical point in an off-axis region thereof. When an axial distancebetween the sixth lens element and the seventh lens element is T67, anaxial distance between the seventh lens element and the eighth lenselement is T78, an axial distance between the object-side surface of thefirst lens element and the image-side surface of the eighth lens elementis TD, a curvature radius of the object-side surface of the eighth lenselement is R15, and a curvature radius of the image-side surface of theeighth lens element is R16, the following conditions are satisfied:2.0<TD/(T67+T78)<6.3; and 0.30<(R15+R16)/(R15−R16).

According to another aspect of the present disclosure, an imagingapparatus includes the photographing optical lens assembly of theaforementioned aspect and an image sensor, wherein the image sensor isdisposed on an image surface of the photographing optical lens assembly.

According to another aspect of the present disclosure, an electronicdevice includes the imaging apparatus of the aforementioned aspect.

According to another aspect of the present disclosure, a photographingoptical lens assembly includes eight lens elements, the eight lenselements being, in order from an object side to an image side along anoptical path, a first lens element, a second lens element, a third lenselement, a fourth lens element, a fifth lens element, a sixth lenselement, a seventh lens element and an eighth lens element. Each of theeight lens elements has an object-side surface towards the object sideand an image-side surface towards the image side. The first lens elementhas positive refractive power. The third lens element has positiverefractive power. The object-side surface of the fifth lens element isconcave in a paraxial region thereof. The object-side surface of theseventh lens element is convex in a paraxial region thereof. Theimage-side surface of the eighth lens element is concave in a paraxialregion thereof. At least one of the object-side surface and theimage-side surface of the eighth lens element includes at least onecritical point in an off-axis region thereof. When an axial distancebetween the sixth lens element and the seventh lens element is T67, anaxial distance between the seventh lens element and the eighth lenselement is T78, a focal length of the photographing optical lensassembly is f, and a curvature radius of the object-side surface of thefifth lens element is R9, the following conditions are satisfied:−0.40<(T67−T78)/(T67+T78); and −1.0<R9/f<0.

According to another aspect of the present disclosure, an imagingapparatus includes the photographing optical lens assembly of theaforementioned aspect and an image sensor, wherein the image sensor isdisposed on an image surface of the photographing optical lens assembly.

According to another aspect of the present disclosure, an electronicdevice includes the imaging apparatus of the aforementioned aspect.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure can be more fully understood by reading thefollowing detailed description of the embodiment, with reference made tothe accompanying drawings as follows:

FIG. 1 is a schematic view of an imaging apparatus according to the 1stembodiment of the present disclosure.

FIG. 2 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 1stembodiment.

FIG. 3 is a schematic view of an imaging apparatus according to the 2ndembodiment of the present disclosure.

FIG. 4 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 2ndembodiment.

FIG. 5 is a schematic view of an imaging apparatus according to the 3rdembodiment of the present disclosure.

FIG. 6 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 3rdembodiment.

FIG. 7 is a schematic view of an imaging apparatus according to the 4thembodiment of the present disclosure.

FIG. 8 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 4thembodiment.

FIG. 9 is a schematic view of an imaging apparatus according to the 5thembodiment of the present disclosure.

FIG. 10 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 5thembodiment.

FIG. 11 is a schematic view of an imaging apparatus according to the 6thembodiment of the present disclosure.

FIG. 12 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 6thembodiment.

FIG. 13 is a schematic view of an imaging apparatus according to the 7thembodiment of the present disclosure.

FIG. 14 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 7thembodiment.

FIG. 15 is a schematic view of an imaging apparatus according to the 8thembodiment of the present disclosure.

FIG. 16 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 8thembodiment.

FIG. 17 is a schematic view of partial parameters, inflection points andcritical points according to the 1st embodiment.

FIG. 18 is a three-dimensional schematic view of an imaging apparatusaccording to the 9th embodiment of the present disclosure.

FIG. 19A is a schematic view of one side of an electronic deviceaccording to the 10th embodiment of the present disclosure.

FIG. 19B is a schematic view of another side of the electronic device ofFIG. 19A.

FIG. 19C is a system schematic view of the electronic device of FIG.19A.

FIG. 20 is a schematic view of an electronic device according to the11th embodiment of the present disclosure.

FIG. 21A is a schematic view of an arrangement of a light path foldingelement in the photographing optical lens assembly of the presentdisclosure.

FIG. 21B is a schematic view of another arrangement of the light pathfolding element in the photographing optical lens assembly of thepresent disclosure.

FIG. 21C is a schematic view of an arrangement of two light path foldingelements in the photographing optical lens assembly of the presentdisclosure.

DETAILED DESCRIPTION

A photographing optical lens assembly includes eight lens elements,which are, in order from an object side to an image side along anoptical path, a first lens element, a second lens element, a third lenselement, a fourth lens element, a fifth lens element, a sixth lenselement, a seventh lens element and an eighth lens element. Each of theeight lens elements has an object-side surface towards the object sideand an image-side surface towards the image side.

The first lens element has positive refractive power, so that it isfavorable for compressing a total track length of the photographingoptical lens assembly. The object-side surface of the first lens elementcan be convex in a paraxial region thereof, so that it allows light fromeach of field of view entering the photographing optical lens assemblyevenly, so as to increase peripheral relative illuminance on an imagesurface. The image-side surface of the first lens element can be concavein a paraxial region thereof, so that it is favorable for correctingaberrations, such as coma aberration.

The object-side surface of the second lens element can be convex in aparaxial region thereof, so that it is favorable for reducing surfacereflection in cooperation with the first lens element. The image-sidesurface of the second lens element can be concave in a paraxial regionthereof, so that it is favorable for correcting aberrations incooperation with the third lens element.

The third lens element can have positive refractive power, so that it isfavorable for reducing sensitivity to increase assembling yield rate bydispersing positive refractive power in which is for compressing thetotal track length of the photographing optical lens assembly. Theobject-side surface of the third lens element can be convex in aparaxial region thereof, so that it is favorable for compressing thetotal track length of the photographing optical lens assembly byadjusting the refractive power of the third lens element.

The object-side surface of the fifth lens element can be concave in aparaxial region thereof, so that it is favorable for obtaining propervolume distribution of the photographing optical lens assembly tobalance among the field of view, the size of the image surface and thetotal track length by adjusting the traveling direction of the light.The image-side surface of the fifth lens element can be convex in aparaxial region thereof, so that it is favorable for enlarging the areaof the image surface by adjusting the traveling direction of the light.

The object-side surface of the sixth lens element can be convex in aparaxial region thereof, so that it is favorable for correctingaberrations in the off-axis region in cooperation with the fifth lenselement. The image-side surface of the sixth lens element can be concavein a paraxial region thereof, so that it is favorable for correctingaberrations and adjusting the volume distribution on the image side ofthe photographing optical lens assembly by adjusting the travelingdirection of the light.

The seventh lens element can have positive refractive power, so that itis favorable for compressing the volume of the image side of thephotographing optical lens assembly. The object-side surface of theseventh lens element can be convex in a paraxial region thereof, so thatit is favorable for balancing among the image quality, the size of theimage surface and the volume distribution by adjusting the surface shapeand the refractive power of the seventh lens element.

The eighth lens element can have negative refractive power, so that itis favorable for obtaining a suitable back focal length. The image-sidesurface of the eighth lens element can be concave in a paraxial regionthereof, so that it is favorable for adjusting the back focal length andcorrect aberrations in the off-axis region, such as field curvature, byobtaining a suitable surface shape of the eighth lens element.

At least one of the object-side surfaces and the image-side surfaces ofthe eight lens elements includes at least one critical point in anoff-axis region thereof. Therefore, it is favorable for increasing thevariation of the surfaces of the lens elements so as to correctaberrations in the off-axis region and increase peripheral illuminanceon the image surface, and to configure wide field of view and largeimage surface. Moreover, at least one of the object-side surfaces andthe image-side surfaces of the sixth lens element, the seventh lenselement and the eighth lens element can include at least one criticalpoint in the off-axis region thereof. Hence, it is favorable forenhancing the image quality in the off-axis region of the image surfaceand compressing the volume of the object side of the photographingoptical lens assembly by arranging the critical points on the image sideof the photographing optical lens assembly.

At least one of the object-side surface and the image-side surface ofthe sixth lens element can include at least one critical point in theoff-axis region thereof, so that it is favorable for adjusting thevolume distribution of the photographing optical lens assembly byadjusting the traveling direction of the light. The object-side surfaceof the sixth lens element can include at least one critical point in theoff-axis region thereof, so that it is favorable for enlarging the areaof the image surface by adjusting the traveling direction of the light.Moreover, the image-side surface of the sixth lens element can includeat least one critical point in the off-axis region thereof, so that itis favorable for reducing aberrations in the off-axis region.

At least one of the object-side surface and the image-side surface ofthe seventh lens element can include at least one critical point in theoff-axis region thereof, so that it is favorable for enhancing the imagequality in the off-axis region of the image surface. The object-sidesurface of the seventh lens element can include at least one criticalpoint in the off-axis region thereof, so that it is favorable forenlarging the area of the image surface and enhancing the image qualityin the off-axis region of the image surface by adjusting the incidentangle of the light on the seventh lens element. Moreover, the image-sidesurface of the seventh lens element can include at least one criticalpoint in the off-axis region thereof, so that it is favorable forcorrecting aberrations in the off-axis region in cooperation with theeighth lens element.

At least one of the object-side surface and the image-side surface ofthe eighth lens element can include at least one critical point in theoff-axis region thereof, so that it is favorable for correctingaberrations in the off-axis region by adjusting the surface shape of theeighth lens element. Moreover, the image-side surface of the eighth lenselement can include at least one critical point in the off-axis regionthereof, so that it is favorable for enhancing the illuminance on theimage surface and the response efficiency of an image sensor bycorrecting aberrations in the off-axis region and adjusting the incidentangle of the light on the image surface.

Each of at least three of the eight lens elements can include at leastone inflection point on at least one of the surfaces thereof. Therefore,it is favorable for correcting aberrations and compressing the volume byincreasing the variation of the surfaces of the lens elements. Each ofat least four or at least five of the eight lens elements can include atleast one inflection point on at least one of the surfaces thereof.Moreover, both the object-side surface and the image-side surface ofeach of the eight lens elements can include at least one inflectionpoint, so that it is favorable for further correcting aberrations andcompressing the volume by increasing the variation of the surfaces ofthe lens elements.

When an axial distance between the first lens element and the secondlens element is T12, an axial distance between the second lens elementand the third lens element is T23, and an axial distance between thethird lens element and the fourth lens element is T34, the followingcondition is satisfied: 5.5<(T12+T34)/T23. Therefore, it is favorablefor compressing the volume of the object side of the photographingoptical lens assembly by configuring the distribution of the lenselements on the object side of the photographing optical lens assembly.Moreover, the following condition can be satisfied:6.5<(T12+T34)/T23<90. Further, the following condition can be satisfied:8.0<(T12+T34)/T23<50. Furthermore, the following condition can besatisfied: 10<(T12+T34)/T23<30.

When a curvature radius of the object-side surface of the third lenselement is R5, and a curvature radius of the image-side surface of thethird lens element is R6, the following condition is satisfied:−1.6<R5/R6 or R5/R6<0.80. Therefore, it is favorable for correctingaberrations and compressing the volume by adjusting the surface shapeand the refractive power of the third lens element. Moreover, thefollowing condition can be satisfied: −1.3<R5/R6; −1.0<R5/R6;−0.70<R5/R6; −0.55<R5/R6; R5/R6<0.55; R5/R6<0.30; or R5/R6<0.15.Further, the following condition can be satisfied: −0.70<R5/R6<0.80.Furthermore, the following condition can be satisfied: −0.55<R5/R6<0.30.

When an axial distance between the sixth lens element and the seventhlens element is T67, an axial distance between the seventh lens elementand the eighth lens element is T78, and an axial distance between theobject-side surface of the first lens element and the image-side surfaceof the eighth lens element is TD, the following condition is satisfied:2.0<TD/(T67+T78)<6.3. Therefore, it is favorable for configuring largeimage surface and short total track length by configuring thedistribution of the lens elements of the photographing optical lensassembly. Moreover, the following condition can be satisfied:3.0<TD/(T67+T78)<6.0. Furthermore, the following condition can besatisfied: 4.0<TD/(T67+T78)<6.0.

When a curvature radius of the object-side surface of the eighth lenselement is R15, and a curvature radius of the image-side surface of theeighth lens element is R16, the following condition is satisfied:0.30<(R15+R16)/(R15−R16). Therefore, it is favorable for adjusting theback focal length and correct aberrations by adjusting the surface shapeof the eighth lens element. Moreover, the following condition can besatisfied: 0.50<(R15+R16)/(R15−R16)<4.0. Further, the followingcondition can be satisfied: 0.70<(R15+R16)/(R15−R16)<2.0. Furthermore,the following condition can be satisfied: 0.85<(R15+R16)/(R15−R16)<1.5.

When the axial distance between the sixth lens element and the seventhlens element is T67, and the axial distance between the seventh lenselement and the eighth lens element is T78, the following condition issatisfied: −0.40<(T67−T78)/(T67+T78) or (T67−T78)/(T67+T78)<0.40.Therefore, it is favorable for correcting aberrations and enlarging thearea of the image surface by adjusting the traveling direction of thelight by cooperating the seventh lens element and the eighth lenselement. Moreover, the following condition can be satisfied:−0.30<(T67−T78)/(T67+T78); −0.20<(T67−T78)/(T67+T78);(T67−T78)/(T67+T78)<0.30; or (T67−T78)/(T67+T78)<0.25. Furthermore, thefollowing condition can be satisfied: −0.30<(T67−T78)/(T67+T78)<0.30.

When a focal length of the photographing optical lens assembly is f, anda curvature radius of the object-side surface of the fifth lens elementis R9, the following condition is satisfied: −1.0<R9/f<0. Therefore, itis favorable for adjusting the traveling direction of the light toobtain proper volume distribution of the photographing optical lensassembly by adjusting the surface shape and the refractive power of thefifth lens element. Moreover, the following condition can be satisfied:−0.90<R9/f<−0.25. Furthermore, the following condition can be satisfied:−0.80<R9/f<−0.45.

When a minimum among Abbe numbers of all the lens elements of thephotographing optical lens assembly is Vmin, the following condition issatisfied: 10.0<Vmin<20.0. Therefore, it is favorable for correctingchromatic aberration by arranging the material with lower Abbe number.

When the axial distance between the sixth lens element and the seventhlens element is T67, the axial distance between the seventh lens elementand the eighth lens element is T78, and a central thickness of theseventh lens element is CT7, the following condition is satisfied:1.5<(T67+T78)/CT7. Therefore, it is favorable for enhancing the imagequality and enlarging the area of the image surface by configuring thedistribution of the lens elements on the image side of the photographingoptical lens assembly. Moreover, the following condition can besatisfied: 1.7<(T67+T78)/CT7<2.8.

When the focal length of the photographing optical lens assembly is f,and a maximum image height of the photographing optical lens assembly isImgH, the following condition is satisfied: 0.75<f/ImgH<1.1. Therefore,it is favorable for balancing among the volume, the field of view andthe size of the image surface.

When a focal length of the seventh lens element is f7, and a focallength of the eighth lens element is f8, the following condition issatisfied: 1.2<|f7/f8|<3.5. Therefore, it is favorable for correctingaberrations by cooperating the refractive power of the seventh lenselement and the eighth lens element. Moreover, the following conditioncan be satisfied: 1.4<|f7/f8|<2.3.

When each of the object-side surface and the image-side surface of theseventh lens element can include at least one critical point in theoff-axis region thereof, a distance between the critical point of theobject-side surface of the seventh lens element and an optical axis isYc71, and a distance between the critical point of the image-sidesurface of the seventh lens element and the optical axis is Yc72, atleast one critical point of the object-side surface and at least onecritical point of the image-side surface of the seventh lens element inthe off-axis region thereof satisfy the following condition:0.80<Yc72/Yc71<1.3. Therefore, it is favorable for correctingaberrations in the off-axis region by adjusting the surface shape of theseventh lens element.

When an Abbe number of the fifth lens element is V5, the followingcondition is satisfied: 15.0<V5<45.0. Therefore, it is favorable forcorrecting chromatic aberration by adjusting the material of the fifthlens element.

When an Abbe number of the sixth lens element is V6, the followingcondition is satisfied: 35.0<V6<60.0. Therefore, it is favorable forcorrecting aberrations in cooperation with the fifth lens element byadjusting the material of the sixth lens element.

When a central thickness of the first lens element is CT1, and a centralthickness of the third lens element is CT3, the following condition issatisfied: 0.65<CT1/CT3<1.4. Therefore, it is favorable for compressingthe volume of the object side of the photographing optical lens assemblyby cooperating the first lens element and the third lens element.Moreover, the following condition can be satisfied: 0.75<CT1/CT3<1.2.

When the axial distance between the first lens element and the secondlens element is T12, the axial distance between the second lens elementand the third lens element is T23, the axial distance between the thirdlens element and the fourth lens element is T34, an axial distancebetween the fourth lens element and the fifth lens element is T45, anaxial distance between the fifth lens element and the sixth lens elementis T56, the axial distance between the sixth lens element and theseventh lens element is T67, and the axial distance between the seventhlens element and the eighth lens element is T78, the following conditionis satisfied: 8.0<(T12+T34+T45+T67+T78)/(T23+T56)<30. Therefore, it isfavorable for compressing the total track length and enlarging the areaof the image surface by configuring the distribution of the lenselements of the photographing optical lens assembly. Moreover, thefollowing condition can be satisfied:10<(T12+T34+T45-1-T67+T78)/(T23+T56)<24.

When an axial distance between the object-side surface of the first lenselement and the image surface is TL, and the maximum image height of thephotographing optical lens assembly is ImgH, the following condition issatisfied: 0.70<TL/ImgH<1.40. Therefore, it is favorable for balancingbetween compressing the total track length and enlarging the area of theimage surface. Moreover, the following condition can be satisfied:0.80<TL/ImgH<1.20.

When a focal length of the first lens element is f1, and a focal lengthof the third lens element is f3, the following condition is satisfied:0.40<f1/f3<1.5. Therefore, it is favorable for avoiding excessiveaberrations as compressing the volume of the photographing optical lensassembly by cooperating the refractive power of the first lens elementand the third lens element. Moreover, the following condition can besatisfied: 0.55<f1/f3<1.2.

When each of the object-side surface and the image-side surface of thesixth lens element can include at least one critical point in theoff-axis region thereof, a distance between the critical point of theobject-side surface of the sixth lens element and the optical axis isYc61, and a distance between the critical point of the image-sidesurface of the sixth lens element and the optical axis is Yc62, at leastone critical point of the object-side surface and at least one criticalpoint of the image-side surface of the sixth lens element in theoff-axis region thereof satisfy the following condition:0.80<Yc62/Yc61<1.3. Therefore, it is favorable for enhancing the imagequality in the off-axis region of the image surface by adjusting thesurface shape of the sixth lens element.

When half of a maximum field of view of the photographing optical lensassembly is HFOV, the following condition is satisfied: 30.0degrees<HFOV<65.0 degrees. Therefore, it is favorable for configuringwide field of view of the photographing optical lens assembly andavoiding distortion from the large field of view. Moreover, thefollowing condition can be satisfied: 35.0 degrees<HFOV<55.0 degrees.

When a maximum distance between an optically effective area of theimage-side surface of the eighth lens element and the optical axis isY82, and a maximum distance between an optically effective area of theobject-side surface of the first lens element and the optical axis isY11, the following condition is satisfied: 2.0<Y82/Y11<5.0. Therefore,it is favorable for balancing among the field of view, the volume andthe size of the image surface by adjusting the ratio of outer diameterof the photographing optical lens assembly.

When an Abbe number of the first lens element is V1, an Abbe number ofthe second lens element is V2, an Abbe number of the third lens elementis V3, an Abbe number of the fourth lens element is V4, the Abbe numberof the fifth lens element is V5, the Abbe number of the sixth lenselement is V6, an Abbe number of the seventh lens element is V7, an Abbenumber of the eighth lens element is V8, an Abbe number of i-th lenselement is Vi, a refractive index of the first lens element is N1, arefractive index of the second lens element is N2, a refractive index ofthe third lens element is N3, a refractive index of the fourth lenselement is N4, a refractive index of the fifth lens element is N5, arefractive index of the sixth lens element is N6, a refractive index ofthe seventh lens element is N7, a refractive index of the eighth lenselement is N8, a refractive index of i-th lens element is Ni, and aminimum of Vi/Ni is (Vi/Ni)min, the following condition is satisfied:8.0<(Vi/Ni)min<12.0, wherein i=1-8. Therefore, it is favorable forcompressing the volume and correct aberrations by arranging thedistribution of materials of the photographing optical lens assembly.

When a sum of central thicknesses of all the lens elements of thephotographing optical lens assembly is ΣCT, and a sum of all axialdistances between adjacent lens elements of the photographing opticallens assembly is ΣAT, the following condition is satisfied:1.0<ΣCT/ΣAT<2.0. Therefore, it is favorable for compressing the totaltrack length by configuring the distribution of the lens elements of thephotographing optical lens assembly.

When an f-number of the photographing optical lens assembly is Fno, thefollowing condition is satisfied: 1.0<Fno<2.4. Therefore, it isfavorable for balancing between the illuminance and the depth of field.Moreover, the following condition can be satisfied: 1.4<Fno<2.2.

When a maximum among central thicknesses of all the lens elements of thephotographing optical lens assembly is CTmax, and a minimum amongcentral thicknesses of all the lens elements of the photographingoptical lens assembly is CTmin, the following condition is satisfied:1.2<CTmax/CTmin<2.5. Therefore, it is favorable for adjusting the masscenter of the photographing optical lens assembly to facilitateassembling by configuring the lens elements more regularly.

When the axial distance between the object-side surface of the firstlens element and the image-side surface of the eighth lens element isTD, and the axial distance between the fourth lens element and the fifthlens element is T45, the following condition is satisfied:2.0<TD/T45<30. Therefore, it is favorable for compressing the volume ofthe object side of the photographing optical lens assembly and enlargingthe area of the image surface by configuring the distribution of thelens elements of the photographing optical lens assembly. Moreover, thefollowing condition can be satisfied: 6.0<TD/T45<25. Furthermore, thefollowing condition can be satisfied: 10<TD/T45<20.

When the axial distance between the object-side surface of the firstlens element and the image surface is TL, the following condition issatisfied: 3.0 mm<TL<14.0 mm. Therefore, it is favorable for variousapplications by adjusting the total track length of the photographingoptical lens assembly. Moreover, the following condition can besatisfied: 4.0 mm<TL<10.0 mm.

When the axial distance between the object-side surface of the firstlens element and the image surface is TL, the focal length of thephotographing optical lens assembly is f, the following condition issatisfied: 1.1<TL/f<1.4. Therefore, it is favorable for balancingbetween the field of view and the total track length.

When the focal length of the photographing optical lens assembly is f,the focal length of the first lens element is f1, a focal length of thesecond lens element is f2, the focal length of the third lens element isf3, a focal length of the fourth lens element is f4, a focal length ofthe fifth lens element is f5, a focal length of the sixth lens elementis f6, the focal length of the seventh lens element is f7, and the focallength of the eighth lens element is f8, at least one of the followingconditions can be satisfied: 0.40<f/f1<1.0; −0.40<f/f2<0.40;0.20<f/f3<1.2; −0.70<f/f4<1.0; −0.80<f/f5<0.70; −0.40<f/f6<0.50;0.50<f/f7<1.0 and −1.8<f/f8<−1.0. Therefore, it is favorable forreducing aberrations and sensitivity and configuring wide field of viewby adjusting the refractive power of the lens elements. Moreover, atleast one of the following conditions can be satisfied: 0.30<f/f3<1.0;−0.40<f/f4<0.50; and −0.60<f/f5<0.35.

When the maximum image height of the photographing optical lens assemblyis ImgH, and an axial distance between the image-side surface of theeighth lens element and the image surface is BL, the following conditionis satisfied: 5.5<ImgH/BL<12. Therefore, it is favorable for obtaining asuitable back focal length and a suitable size of the image surface, andadjusting the incident angle of the light on the image surface toenhance the response efficiency of an image sensor.

When the focal length of the third lens element is f3, and the focallength of the seventh lens element is f7, the following condition issatisfied: 0.50<f3/f7<5.0. Therefore, it is favorable for compressingthe volume of the photographing optical lens assembly by adjusting therefractive power distribution of the photographing optical lensassembly. Moreover, the following condition can be satisfied:0.75<f3/f7<2.4.

When the image-side surface of the eighth lens element can include atleast one critical point in the off-axis region thereof, a distancebetween the critical point of the image-side surface of the eighth lenselement and the optical axis is Yc82, and the maximum distance betweenthe optically effective area of the image-side surface of the eighthlens element and the optical axis is Y82, at least one critical point ofthe image-side surface of the eighth lens element in the off-axis regionthereof satisfies the following condition: 0.25<Yc82/Y82<0.65.Therefore, it is favorable for enhancing the image quality by adjustingthe surface shape of the eighth lens element.

Each of the aforementioned features of the photographing optical lensassembly can be utilized in various combinations for achieving thecorresponding effects.

According to the photographing optical lens assembly of the presentdisclosure, the lens elements thereof can be made of glass or plasticmaterials. When the lens elements are made of glass materials, thedistribution of the refractive power of the photographing optical lensassembly may be more flexible to design. The glass lens element caneither be made by grinding or molding. When the lens elements are madeof plastic materials, manufacturing costs can be effectively reduced.Furthermore, surfaces of each lens element can be arranged to bespherical or aspheric (ASP), wherein it is easier to fabricate thespherical surface. If the surfaces are arranged to be aspheric, morecontrollable variables can be obtained for eliminating aberrationsthereof, and to further decrease the required amount of lens elements inthe photographing optical lens assembly. Therefore, the total tracklength of the photographing optical lens assembly can also be reduced.The aspheric surfaces may be formed by plastic injection molding orglass molding.

According to the photographing optical lens assembly of the presentdisclosure, one or more of the lens material may optionally include anadditive which alters the lens transmittance in a specific range ofwavelength for reducing unwanted stray light or color deviation. Forexample, the additive may optionally filter out light in the wavelengthrange of 600 nm-800 nm for reducing excessive red light and/or nearinfra-red light, or may optionally filter out light in the wavelengthrange of 350 nm-450 nm to reduce excessive blue light and/or nearultra-violet light from interfering the final image. The additive may behomogenously mixed with a plastic material to be used in manufacturing amixed-material lens element by injection molding.

According to the photographing optical lens assembly of the presentdisclosure, when a surface of a lens element is aspheric, it indicatesthat the surface has an aspheric shape throughout its opticallyeffective area or a portion(s) thereof.

According to the photographing optical lens assembly of the presentdisclosure, when the lens element has a convex surface, it indicatesthat the surface can be convex in the paraxial region thereof; when thelens element has a concave surface, it indicates that the surface can beconcave in the paraxial region thereof. According to the photographingoptical lens assembly of the present disclosure, the refractive power orthe focal length of a lens element being positive or negative may referto the refractive power or the focal length in a paraxial region of thelens element.

According to the photographing optical lens assembly of the presentdisclosure, a critical point is a non-axial point of the lens surfacewhere its tangent is perpendicular to the optical axis.

According to the photographing optical lens assembly of the presentdisclosure, the definition of the inflection point is a point on a lenssurface with a curvature changing from positive to negative or fromnegative to positive.

According to the photographing optical lens assembly of the presentdisclosure, the image surface of the photographing optical lensassembly, based on the corresponding image sensor, can be flat orcurved. In particular, the image surface can be a concave curved surfacefacing towards the object side. According to the photographing opticallens assembly of the present disclosure, at least one image correctingelement (such as a field flattener) can be selectively disposed betweenthe lens element closest to the image side of the photographing opticallens assembly and the image surface on an imaging optical path so as tocorrect the image (such as the field curvature). Properties of the imagecorrecting element, such as curvature, thickness, refractive index,position, surface shape (convex/concave,spherical/aspheric/diffractive/Fresnel etc.) can be adjusted accordingto the requirements of the imaging apparatus. In general, the imagecorrecting element is preferably a thin plano-concave element having aconcave surface towards the object side and is disposed close to theimage surface.

According to the photographing optical lens assembly of the presentdisclosure, at least one element with light path folding function can beselectively disposed between the imaged object and the image surface,such as a prism or a mirror. Therefore it is favorable for providinghigh flexible space arrangement of the photographing optical lensassembly, so that the compactness of the electronic device would not berestricted by the optical total track length of the photographingoptical lens assembly. FIG. 21A is a schematic view of an arrangement ofa light path folding element LF in the photographing optical lensassembly of the present disclosure. FIG. 21B is a schematic view ofanother arrangement of the light path folding element LF in thephotographing optical lens assembly of the present disclosure. As shownin FIGS. 21A and 21B, the photographing optical lens assembly includes,in order from an imaged object (not shown in drawings) to an imagesurface IM, a first optical axis OA1, the light path folding element LFand a second optical axis OA2, wherein the light path folding element LFcan be disposed between the imaged object and a lens group LG of thephotographing optical lens assembly as shown in FIG. 21A, or can bedisposed between the lens group LG of the photographing optical lensassembly and the image surface IM as shown in FIG. 21B. Moreover, FIG.21C is a schematic view of an arrangement of two light path foldingelements LF1, LF2 in the photographing optical lens assembly of thepresent disclosure. As shown in FIG. 21C, the photographing optical lensassembly includes, in order from an imaged object (not shown indrawings) to an image surface IM, a first optical axis OA1, the lightpath folding element LF1, a second optical axis OA2, the light pathfolding element LF2 and a third optical axis OA3, wherein the light pathfolding element LF1 is disposed between the imaged object and a lensgroup LG of the photographing optical lens assembly, and the light pathfolding element LF2 is disposed between the lens group LG of thephotographing optical lens assembly and the image surface IM. Thephotographing optical lens assembly can also be selectively disposedwith three or more light path folding element, the type, amount andlocation of the light path folding element will not be limited to thepresent disclosure.

According to the photographing optical lens assembly of the presentdisclosure, the photographing optical lens assembly can include at leastone stop, such as an aperture stop, a glare stop or a field stop. Saidglare stop or said field stop is for eliminating the stray light andthereby improving the image resolution thereof.

According to the photographing optical lens assembly of the presentdisclosure, an aperture stop can be configured as a front stop or amiddle stop. A front stop disposed between the object and the first lenselement can provide a longer distance between an exit pupil of thephotographing optical lens assembly and the image surface, and therebyobtains a telecentric effect and improves the image-sensing efficiencyof the image sensor, such as CCD or CMOS. A middle stop disposed betweenthe first lens element and the image surface is favorable for enlargingthe field of view of the photographing optical lens assembly and therebyprovides a wider field of view for the same.

According to the photographing optical lens assembly of the presentdisclosure, an aperture adjusting unit can be properly configured. Theaperture adjusting unit can be a mechanical part or a light controlpart, and the dimension and the shape of the aperture adjusting unit canbe electrically controlled. The mechanical part can include a moveablecomponent such as a blade group or a shielding plate. The light controlpart can include a screen component such as a light filter, anelectrochromic material, a liquid crystal layer or the like. The amountof incident light or the exposure time of the image can be controlled bythe aperture adjusting unit to enhance the image moderation ability. Inaddition, the aperture adjusting unit can be the aperture stop of thephotographing optical lens assembly according to the present disclosure,so as to moderate the image properties such as depth of field or theexposure speed by changing f-number.

According to the photographing optical lens assembly of the presentdisclosure, the photographing optical lens assembly can be applied to 3D(three-dimensional) image capturing applications, in products such asdigital cameras, mobile devices, digital tablets, smart TVs,surveillance systems, motion sensing input devices, driving recordingsystems, rearview camera systems, wearable devices, and unmanned aerialvehicles.

According to the present disclosure, an imaging apparatus is provided.The imaging apparatus includes the aforementioned photographing opticallens assembly and an image sensor, wherein the image sensor is disposedon the image side of the aforementioned photographing optical lensassembly, that is, the image sensor can be disposed on or near the imagesurface of the aforementioned photographing optical lens assembly. It isfavorable for obtaining large image surface and reducing the total tracklength of the photographing optical lens assembly by properly arrangingthe first lens element having positive refractive power and arrangingthe critical point on the surface of at least one lens element.Preferably, the imaging apparatus can further include a barrel member, aholder member or a combination thereof.

According to the present disclosure, an electronic device is provided,wherein the electronic device includes the aforementioned imagingapparatus. Therefore, it is favorable for enhancing the image quality.Preferably, the electronic device can further include, but not limitedto, a control unit, a display, a storage unit, a random access memoryunit (RAM) or a combination thereof.

According to the above description of the present disclosure, thefollowing specific embodiments are provided for further explanation.

1st Embodiment

FIG. 1 is a schematic view of an imaging apparatus according to the 1stembodiment of the present disclosure. FIG. 2 shows, in order from leftto right, spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus of the 1st embodiment. In FIG.1 , the imaging apparatus according to the 1st embodiment includes aphotographing optical lens assembly (its reference number is omitted)and an image sensor 196. The photographing optical lens assemblyincludes, in order from an object side to an image side along an opticalpath, an aperture stop 100, a first lens element 110, a second lenselement 120, a stop 101, a third lens element 130, a fourth lens element140, a fifth lens element 150, a sixth lens element 160, a seventh lenselement 170, an eighth lens element 180, a filter 190 and an imagesurface 195, wherein the image sensor 196 is disposed on the imagesurface 195 of the photographing optical lens assembly. Thephotographing optical lens assembly includes eight lens elements (110,120, 130, 140, 150, 160, 170, 180) without additional one or more lenselements inserted between the first lens element 110 and the eighth lenselement 180.

The first lens element 110 with positive refractive power has anobject-side surface 111 being convex in a paraxial region thereof and animage-side surface 112 being concave in a paraxial region thereof. Thefirst lens element 110 is made of a plastic material, and has theobject-side surface 111 and the image-side surface 112 being bothaspheric. FIG. 17 is a schematic view of partial parameters, inflectionpoints and critical points according to the 1st embodiment, wherein “●”symbolizes the inflection points, and “▪” symbolizes the criticalpoints. In FIG. 17 , the object-side surface 111 of the first lenselement 110 includes an inflection point in an off-axis region thereof,and the image-side surface 112 of the first lens element 110 includes aninflection point in an off-axis region thereof.

The second lens element 120 with negative refractive power has anobject-side surface 121 being convex in a paraxial region thereof and animage-side surface 122 being concave in a paraxial region thereof. Thesecond lens element 120 is made of a plastic material, and has theobject-side surface 121 and the image-side surface 122 being bothaspheric. Furthermore, the object-side surface 121 of the second lenselement 120 includes two inflection points in an off-axis regionthereof, and the image-side surface 122 of the second lens element 120includes three inflection points in an off-axis region thereof.

The third lens element 130 with positive refractive power has anobject-side surface 131 being convex in a paraxial region thereof and animage-side surface 132 being convex in a paraxial region thereof. Thethird lens element 130 is made of a glass material, and has theobject-side surface 131 and the image-side surface 132 being bothaspheric. Furthermore, the image-side surface 132 of the third lenselement 130 includes an inflection point and a critical point in anoff-axis region thereof.

The fourth lens element 140 with negative refractive power has anobject-side surface 141 being convex in a paraxial region thereof and animage-side surface 142 being concave in a paraxial region thereof. Thefourth lens element 140 is made of a plastic material, and has theobject-side surface 141 and the image-side surface 142 being bothaspheric. Furthermore, the object-side surface 141 of the fourth lenselement 140 includes an inflection point and a critical point in anoff-axis region thereof, and the image-side surface 142 of the fourthlens element 140 includes two inflection points and a critical point inan off-axis region thereof.

The fifth lens element 150 with negative refractive power has anobject-side surface 151 being concave in a paraxial region thereof andan image-side surface 152 being convex in a paraxial region thereof. Thefifth lens element 150 is made of a plastic material, and has theobject-side surface 151 and the image-side surface 152 being bothaspheric. Furthermore, the image-side surface 152 of the fifth lenselement 150 includes two inflection points in an off-axis regionthereof.

The sixth lens element 160 with positive refractive power has anobject-side surface 161 being convex in a paraxial region thereof and animage-side surface 162 being concave in a paraxial region thereof. Thesixth lens element 160 is made of a plastic material, and has theobject-side surface 161 and the image-side surface 162 being bothaspheric. Furthermore, the object-side surface 161 of the sixth lenselement 160 includes two inflection points and a critical point in anoff-axis region thereof, and the image-side surface 162 of the sixthlens element 160 includes an inflection point and a critical point in anoff-axis region thereof.

The seventh lens element 170 with positive refractive power has anobject-side surface 171 being convex in a paraxial region thereof and animage-side surface 172 being concave in a paraxial region thereof. Theseventh lens element 170 is made of a plastic material, and has theobject-side surface 171 and the image-side surface 172 being bothaspheric. Furthermore, the object-side surface 171 of the seventh lenselement 170 includes four inflection points and a critical point in anoff-axis region thereof, and the image-side surface 172 of the seventhlens element 170 includes two inflection points and a critical point inan off-axis region thereof.

The eighth lens element 180 with negative refractive power has anobject-side surface 181 being concave in a paraxial region thereof andan image-side surface 182 being concave in a paraxial region thereof.The eighth lens element 180 is made of a plastic material, and has theobject-side surface 181 and the image-side surface 182 being bothaspheric. Furthermore, the object-side surface 181 of the eighth lenselement 180 includes three inflection points in an off-axis regionthereof, and the image-side surface 182 of the eighth lens element 180includes two inflection points and a critical point in an off-axisregion thereof.

The filter 190 is made of a glass material and disposed between theeighth lens element 180 and the image surface 195 and will not affect afocal length of the photographing optical lens assembly.

The equation of the aspheric surface profiles of the aforementioned lenselements is expressed as follows:

${{X(Y)} = {{\left( {Y^{2}/R} \right)/\left( {1 + {sqr{t\left( {1 - {\left( {1 + k} \right) \times \left( {Y/R} \right)^{2}}} \right)}}} \right)} + {\sum\limits_{i}{({Ai}) \times \left( Y^{i} \right)}}}};$wherein,X is a displacement in parallel with an optical axis from theintersection point of the aspheric surface and the optical axis to apoint at a distance Y from the optical axis on the aspheric surface;Y is the vertical distance from the point on the aspheric surface to theoptical axis;R is the curvature radius;k is the conic coefficient; andAi is the i-th aspheric coefficient.

In the photographing optical lens assembly according to the 1stembodiment, when a focal length of the photographing optical lensassembly is f, an f-number of the photographing optical lens assembly isFno, and half of a maximum field of view of the photographing opticallens assembly is HFOV, these parameters have the following values:f=7.03 mm; Fno=2.00; and HFOV=46.2 degrees.

In the photographing optical lens assembly according to the 1stembodiment, when an Abbe number of the first lens element 110 is V1, anAbbe number of the second lens element 120 is V2, an Abbe number of thethird lens element 130 is V3, an Abbe number of the fourth lens element140 is V4, an Abbe number of the fifth lens element 150 is V5, an Abbenumber of the sixth lens element 160 is V6, an Abbe number of theseventh lens element 170 is V7, an Abbe number of the eighth lenselement 180 is V8, an Abbe number of i-th lens element is Vi, arefractive index of the first lens element 110 is N1, a refractive indexof the second lens element 120 is N2, a refractive index of the thirdlens element 130 is N3, a refractive index of the fourth lens element140 is N4, a refractive index of the fifth lens element 150 is N5, arefractive index of the sixth lens element 160 is N6, a refractive indexof the seventh lens element 170 is N7, a refractive index of the eighthlens element 180 is N8, a refractive index of i-th lens element is Ni, aminimum of Vi/Ni is (Vi/Ni)min, and a minimum among Abbe numbers of allthe lens elements of the photographing optical lens assembly is Vmin,the following conditions are satisfied: V5=26.0; V6=56.0;(Vi/Ni)min=10.98, wherein i=1-8; and Vmin=18.4. In the 1st embodiment,(Vi/Ni)min=V4/N4, and Vmin=V4.

In the photographing optical lens assembly according to the 1stembodiment, when a central thickness of the first lens element 110 isCT1, a central thickness of the second lens element 120 is CT2, acentral thickness of the third lens element 130 is CT3, a centralthickness of the fourth lens element 140 is CT4, a central thickness ofthe fifth lens element 150 is CT5, a central thickness of the sixth lenselement 160 is CT6, a central thickness of the seventh lens element 170is CT7, a central thickness of the eighth lens element 180 is CT8, a sumof central thicknesses of all the lens elements of the photographingoptical lens assembly is ΣCT, an axial distance between the first lenselement 110 and the second lens element 120 is T12, an axial distancebetween the second lens element 120 and the third lens element 130 isT23, an axial distance between the third lens element 130 and the fourthlens element 140 is T34, an axial distance between the fourth lenselement 140 and the fifth lens element 150 is T45, an axial distancebetween the fifth lens element 150 and the sixth lens element 160 isT56, an axial distance between the sixth lens element 160 and theseventh lens element 170 is T67, an axial distance between the seventhlens element 170 and the eighth lens element 180 is T78, a sum of allaxial distances between adjacent lens elements of the photographingoptical lens assembly is ΣAT, a maximum among central thicknesses of allthe lens elements of the photographing optical lens assembly is CTmax, aminimum among central thicknesses of all the lens elements of thephotographing optical lens assembly is CTmin, and an axial distancebetween the object-side surface 111 of the first lens element 110 andthe image-side surface 182 of the eighth lens element 180 is TD, thefollowing conditions are satisfied: ΣCT/ΣAT=1.48; CT1/CT3=0.96;CTmax/CTmin=2.14; (T12+T34)/T23=13.52;(T12+T34+T45+T67+T78)/(T23+T56)=16.08; (T67+T78)/CT7=2.24;(T67−T78)/(T67+T78)=0.06; TD/T45=15.42; and TD/(T67+T78)=5.02. In the1st embodiment, the axial distance between adjacent lens elements is theaxial distance between two adjacent surfaces of the adjacent lenselements; ΣCT=CT1+CT2+CT3+CT4+CT5+CT6+CT7+CT8;ΣAT=T12+T23+T34+T45+T56+T67+T78; CTmax=CT8; and CTmin=CT2.

In the photographing optical lens assembly according to the 1stembodiment, when an axial distance between the object-side surface 111of the first lens element 110 and the image surface 195 is TL, the focallength of the photographing optical lens assembly is f, and a maximumimage height of the photographing optical lens assembly is ImgH, thefollowing conditions are satisfied: TL=8.81 mm; TL/f=1.25; andTL/ImgH=1.11.

In the photographing optical lens assembly according to the 1stembodiment, when the focal length of the photographing optical lensassembly is f, a curvature radius of the object-side surface 131 of thethird lens element 130 is R5, a curvature radius of the image-sidesurface 132 of the third lens element 130 is R6, a curvature radius ofthe object-side surface 151 of the fifth lens element 150 is R9, acurvature radius of the object-side surface 181 of the eighth lenselement 180 is R15, and a curvature radius of the image-side surface 182of the eighth lens element 180 is R16, the following conditions aresatisfied: R5/R6=−0.11; R9/f=−0.58; and (R15+R16)/(R15−R16)=0.98.

In the photographing optical lens assembly according to the 1stembodiment, when the focal length of the photographing optical lensassembly is f, a focal length of the first lens element 110 is f1, afocal length of the second lens element 120 is f2, a focal length of thethird lens element 130 is f3, a focal length of the fourth lens element140 is f4, a focal length of the fifth lens element 150 is f5, a focallength of the sixth lens element 160 is f6, a focal length of theseventh lens element 170 is f7, a focal length of the eighth lenselement 180 is f8, the maximum image height of the photographing opticallens assembly is ImgH, and an axial distance between the image-sidesurface 182 of the eighth lens element 180 and an image surface 195 isBL, the following conditions are satisfied: f/f1=0.63; f/f2=−0.32;f/f3=0.63; f/14=−0.02; f/f5=−0.38; f/f6=0.34; f/f7=0.74; f/f8=−1.24;f/ImgH=0.89; f1/f3=1.01; f3/f7=1.17; [f7/f8]=1.67 and ImgH/BL=6.39.

In FIG. 17 , when a distance between the critical point of theobject-side surface 161 of the sixth lens element 160 and the opticalaxis is Yc61, a distance between the critical point of the image-sidesurface 162 of the sixth lens element 160 and the optical axis is Yc62,a distance between the critical point of the object-side surface 171 ofthe seventh lens element 170 and the optical axis is Yc71, a distancebetween the critical point of the image-side surface 172 of the seventhlens element 170 and the optical axis is Yc72, a distance between thecritical point of the image-side surface 182 of the eighth lens element180 and the optical axis is Yc82, a maximum distance between anoptically effective area of the object-side surface 111 of the firstlens element 110 and the optical axis is Y11, and a maximum distancebetween an optically effective area of the image-side surface 182 of theeighth lens element 180 and the optical axis is Y82, the followingconditions are satisfied: Y82/Y11=3.52; Yc62/Yc61=1.08; Yc72/Yc71=1.09;and Yc82/Y82=0.40.

The detailed optical data of the 1st embodiment are shown in Table 1 andthe aspheric surface data are shown in Table 2 below.

TABLE 1 1st Embodiment f = 7.03 mm, Fno = 2.00, HFOV = 46.2 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano 2000.000 1 Ape. Stop Plano −0.532 2 Lens 1 3.006 ASP 0.648 Plastic1.545 56.1 11.17 3 5.489 ASP 0.315 4 Lens 2 7.110 ASP 0.335 Plastic1.660 20.4 −22.30 5 4.704 ASP 0.384 6 Stop Plano −0.319 7 Lens 3 6.425ASP 0.676 Glass 1.522 62.2 11.09 8 −56.797 ASP 0.564 9 Lens 4 130.894ASP 0.411 Plastic 1.679 18.4 −354.49 10 84.688 ASP 0.491 11 Lens 5−4.111 ASP 0.494 Plastic 1.614 26.0 −18.49 12 −6.741 ASP 0.114 13 Lens 63.040 ASP 0.559 Plastic 1.544 56.0 20.95 14 3.876 ASP 0.798 15 Lens 74.294 ASP 0.674 Plastic 1.544 56.0 9.48 16 24.175 ASP 0.711 17 Lens 8−250.000 ASP 0.718 Plastic 1.534 55.9 −5.69 18 3.078 ASP 0.800 19 FilterPlano 0.110 Glass 1.517 64.2 — 20 Plano 0.331 21 Image Plano — Referencewavelength is 587.6 nm (d-line). Effective radius of Surface 6 (Stop101) is 1.890 mm.

TABLE 2 Aspheric Coefficients Surface # 2 3 4 5 7 8 k =  5.1753E−01−3.4822E+00  −8.8242E−02 −1.0643E+01  1.5913E−01 4.3048E+01 A4 =−1.9587E−03 9.8797E−04 −1.7042E−02 −1.0811E−03  6.2476E−03 1.2973E−03 A6= −7.9930E−04 −1.5801E−03  −2.8420E−03 −6.4652E−03 −1.6990E−03−2.7486E−03  A8 = −5.7057E−05 8.5649E−04  4.4915E−03 −5.7158E−04−6.6797E−03 3.8992E−03 A10 =  1.7597E−05 −4.7925E−04  −1.8390E−03 3.8768E−03  6.9373E−03 −2.8076E−03  A12 = −3.7719E−05 1.8335E−05 2.2991E−04 −2.3561E−03 −3.0878E−03 1.1930E−03 A14 = 1.0640E−05 5.5603E−05  6.3870E−04  6.7690E−04 −2.8092E−04  A16 = −1.1385E−05−6.4619E−05 −5.7471E−05 2.7998E−05 Surface # 9 10 11 12 13 14 k =−9.9000E+01 −9.9000E+01 1.5510E−01 −8.1276E−01 −1.2377E+01 −4.6728E+00A4 = −1.5364E−02  9.3674E−04 5.0690E−02  1.4244E−02  9.4115E−03−2.3377E−02 A6 = −3.9914E−03 −1.4168E−02 −4.0851E−02  −1.8841E−02−2.1847E−03  1.3568E−02 A8 = −2.0733E−04  1.0175E−02 2.4104E−02 8.5664E−03  2.7347E−04 −4.2054E−03 A10 = −1.7291E−04 −5.7557E−03−9.3661E−03  −2.3905E−03 −1.3536E−04  7.2938E−04 A12 =  2.5362E−04 2.0269E−03 2.3032E−03  4.3275E−04  3.3191E−05 −7.8688E−05 A14 =−8.7525E−05 −4.1845E−04 −3.4410E−04  −4.6700E−05 −4.1003E−06  5.3471E−06A16 =  9.7613E−06  4.6394E−05 2.8656E−05  2.6629E−06  2.7285E−07−2.2043E−07 A18 = −2.0806E−06 −1.0293E−06  −6.1180E−08 −9.2741E−09 5.0002E−09 A20 =  1.2576E−10 −4.7646E−11 Surface # 15 16 17 18 k =−1.0088E+00 9.5988E+00 −9.9000E+01 −6.6218E+00 A4 =  2.8495E−032.6648E−02 −3.2521E−02 −2.1202E−02 A6 = −5.2422E−03 −7.8713E−03  5.9251E−03  3.4197E−03 A8 =  9.5495E−04 8.5806E−04 −5.0453E−04−3.3913E−04 A10 = −1.6187E−04 −4.6016E−05   2.0536E−05  2.1384E−05 A12 = 1.9364E−05 9.6154E−07 −1.5330E−07 −8.8415E−07 A14 = −1.3427E−062.0654E−08 −2.0859E−08  2.3723E−08 A16 =  5.2037E−08 −1.6262E−09  8.9381E−10 −3.9505E−10 A18 = −1.0533E−09 3.3835E−11 −1.5168E−11 3.6991E−12 A20 =  8.6926E−12 −2.4029E−13   9.7717E−14 −1.4898E−14

Table 1 shows the detailed optical data of FIG. 1 of the 1st embodiment,wherein the curvature radius, thickness and the focal length are shownin millimeters (mm), and Surface numbers 0-21 represent the surfacessequentially arranged from the object side to the image side. Table 2shows the aspheric surface data of the 1st embodiment, wherein krepresents the conic coefficient of the equation of the aspheric surfaceprofiles, and A4-A20 represent the aspheric coefficients of each surfaceranging from the 4th order to the 20th order. The tables presented belowfor each embodiment correspond to the schematic view and aberrationcurves of each embodiment, and term definitions of the tables are thesame as those in Table 1 and Table 2 of the 1st embodiment. Therefore,an explanation in this regard will not be provided again.

2nd Embodiment

FIG. 3 is a schematic view of an imaging apparatus according to the 2ndembodiment of the present disclosure. FIG. 4 shows, in order from leftto right, spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus of the 2nd embodiment. In FIG.3 , the imaging apparatus according to the 2nd embodiment includes aphotographing optical lens assembly (its reference number is omitted)and an image sensor 296. The photographing optical lens assemblyincludes, in order from an object side to an image side along an opticalpath, an aperture stop 200, a first lens element 210, a second lenselement 220, a stop 201, a third lens element 230, a fourth lens element240, a fifth lens element 250, a sixth lens element 260, a seventh lenselement 270, an eighth lens element 280, a filter 290 and an imagesurface 295, wherein the image sensor 296 is disposed on the imagesurface 295 of the photographing optical lens assembly. Thephotographing optical lens assembly includes eight lens elements (210,220, 230, 240, 250, 260, 270, 280) without additional one or more lenselements inserted between the first lens element 210 and the eighth lenselement 280.

The first lens element 210 with positive refractive power has anobject-side surface 211 being convex in a paraxial region thereof and animage-side surface 212 being concave in a paraxial region thereof. Thefirst lens element 210 is made of a plastic material, and has theobject-side surface 211 and the image-side surface 212 being bothaspheric.

The second lens element 220 with negative refractive power has anobject-side surface 221 being convex in a paraxial region thereof and animage-side surface 222 being concave in a paraxial region thereof. Thesecond lens element 220 is made of a plastic material, and has theobject-side surface 221 and the image-side surface 222 being bothaspheric. Furthermore, the object-side surface 221 of the second lenselement 220 includes three inflection points in an off-axis regionthereof, and the image-side surface 222 of the second lens element 220includes an inflection point in an off-axis region thereof.

The third lens element 230 with positive refractive power has anobject-side surface 231 being convex in a paraxial region thereof and animage-side surface 232 being concave in a paraxial region thereof. Thethird lens element 230 is made of a plastic material, and has theobject-side surface 231 and the image-side surface 232 being bothaspheric. Furthermore, the image-side surface 232 of the third lenselement 230 includes two inflection points and two critical points in anoff-axis region thereof.

The fourth lens element 240 with positive refractive power has anobject-side surface 241 being concave in a paraxial region thereof andan image-side surface 242 being convex in a paraxial region thereof. Thefourth lens element 240 is made of a plastic material, and has theobject-side surface 241 and the image-side surface 242 being bothaspheric. Furthermore, the object-side surface 241 of the fourth lenselement 240 includes an inflection point in an off-axis region thereof,and the image-side surface 242 of the fourth lens element 240 includesan inflection point in an off-axis region thereof.

The fifth lens element 250 with negative refractive power has anobject-side surface 251 being concave in a paraxial region thereof andan image-side surface 252 being convex in a paraxial region thereof. Thefifth lens element 250 is made of a plastic material, and has theobject-side surface 251 and the image-side surface 252 being bothaspheric. Furthermore, the object-side surface 251 of the fifth lenselement 250 includes two inflection points in an off-axis regionthereof, and the image-side surface 252 of the fifth lens element 250includes two inflection points in an off-axis region thereof.

The sixth lens element 260 with positive refractive power has anobject-side surface 261 being convex in a paraxial region thereof and animage-side surface 262 being concave in a paraxial region thereof. Thesixth lens element 260 is made of a plastic material, and has theobject-side surface 261 and the image-side surface 262 being bothaspheric. Furthermore, the object-side surface 261 of the sixth lenselement 260 includes an inflection point and a critical point in anoff-axis region thereof, and the image-side surface 262 of the sixthlens element 260 includes three inflection points and a critical pointin an off-axis region thereof.

The seventh lens element 270 with positive refractive power has anobject-side surface 271 being convex in a paraxial region thereof and animage-side surface 272 being concave in a paraxial region thereof. Theseventh lens element 270 is made of a plastic material, and has theobject-side surface 271 and the image-side surface 272 being bothaspheric. Furthermore, the object-side surface 271 of the seventh lenselement 270 includes two inflection points and a critical point in anoff-axis region thereof, and the image-side surface 272 of the seventhlens element 270 includes two inflection points and a critical point inan off-axis region thereof.

The eighth lens element 280 with negative refractive power has anobject-side surface 281 being convex in a paraxial region thereof and animage-side surface 282 being concave in a paraxial region thereof. Theeighth lens element 280 is made of a plastic material, and has theobject-side surface 281 and the image-side surface 282 being bothaspheric. Furthermore, the object-side surface 281 of the eighth lenselement 280 includes four inflection points and a critical point in anoff-axis region thereof, and the image-side surface 282 of the eighthlens element 280 includes two inflection points and a critical point inan off-axis region thereof.

The filter 290 is made of a glass material and disposed between theeighth lens element 280 and the image surface 295 and will not affect afocal length of the photographing optical lens assembly.

The detailed optical data of the 2nd embodiment are shown in Table 3 andthe aspheric surface data are shown in Table 4 below.

TABLE 3 2nd Embodiment f = 7.10 mm, Fno = 2.00, HFOV = 46.5 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano 2000.000 1 Ape. Stop Plano −0.562 2 Lens 1 3.216 ASP 0.650 Plastic1.545 56.1 11.14 3 6.351 ASP 0.378 4 Lens 2 7.653 ASP 0.335 Plastic1.669 19.5 −19.03 5 4.696 ASP 0.372 6 Stop Plano −0.298 7 Lens 3 6.854ASP 0.659 Plastic 1.544 56.0 13.11 8 169.290 ASP 0.545 9 Lens 4 −142.893ASP 0.567 Plastic 1.544 56.0 35.47 10 −17.026 ASP 0.433 11 Lens 5 −4.241ASP 0.461 Plastic 1.587 28.3 −20.27 12 −6.854 ASP 0.144 13 Lens 6 3.891ASP 0.600 Plastic 1.544 56.0 24.23 14 5.219 ASP 0.724 15 Lens 7 4.372ASP 0.654 Plastic 1.544 56.0 11.02 16 15.306 ASP 0.869 17 Lens 8 36.289ASP 0.700 Plastic 1.534 55.9 −5.57 18 2.728 ASP 0.700 19 Filter Plano0.210 Glass 1.517 64.2 — 20 Plano 0.363 21 Image Plano — Referencewavelength is 587.6 nm (d-line). Effective radius of Surface 6 (Stop201) is 1.930 mm.

TABLE 4 Aspheric Coefficients Surface # 2 3 4 5 7 8 k =  1.2595E+00 3.4154E−01 −9.5080E+01 −1.0740E+01 0.0000E+00 0.0000E+00 A4 =−4.0393E−03 −2.7551E−03  2.3818E−03 −7.1266E−03 −3.9079E−05 −3.5679E−03  A6 = −3.2038E−04 −5.5774E−04 −1.2403E−02  1.2028E−033.7297E−04 9.9308E−04 A8 = −1.8102E−04  7.1532E−04  7.9088E−03 2.2406E−04 6.8069E−05 −9.0611E−04  A10 = −9.3449E−06 −3.2837E−04−2.8995E−03 −5.3873E−04 −6.3216E−04  4.8003E−04 A12 =  6.6669E−05 6.3164E−04  2.9075E−04 2.8651E−04 −1.6882E−04  A14 = −5.8816E−05−4.1405E−05 −3.2480E−05  2.5235E−05 Surface # 9 10 11 12 13 14 k = 0.0000E+00  1.8899E+01 8.2476E−01 1.7658E+00 −1.5370E+01 −4.0440E+00 A4= −1.5536E−02 −3.8764E−03 4.0558E−02 2.2697E−02  1.1279E−02 −1.7465E−02A6 =  3.5679E−04 −5.5829E−03 −2.5617E−02  −1.8526E−02  −4.8204E−03 7.0653E−03 A8 = −2.9505E−03  8.7219E−04 9.7460E−03 5.8638E−03 1.1199E−03 −1.8438E−03 A10 =  1.6837E−03 −1.4824E−04 −2.8073E−03 −1.0793E−03  −2.0498E−04  2.9151E−04 A12 = −5.6947E−04  4.5016E−056.9251E−04 1.4744E−04  2.3015E−05 −3.1531E−05 A14 =  9.5269E−05−7.8159E−06 −1.1817E−04  −1.4519E−05  −1.5176E−06  2.2836E−06 A16 =−5.2645E−06  6.3343E−07 1.1240E−05 8.4253E−07  5.4234E−08 −1.0213E−07A18 = −4.4702E−07  −2.0615E−08  −7.9925E−10  2.4987E−09 A20 =−2.5319E−11 Surface # 15 16 17 18 k = −1.0000E+00  3.4230E+00 0.0000E+00−6.8547E+00 A4 =  4.4905E−03  2.2086E−02 −4.6109E−02  −2.3406E−02 A6 =−4.9933E−03 −6.1364E−03 9.3695E−03  4.4617E−03 A8 =  7.9119E−04 5.5076E−04 −9.6259E−04  −5.3846E−04 A10 = −1.3300E−04 −1.2132E−055.8030E−05  4.3256E−05 A12 =  1.6699E−05 −1.5074E−06 −2.1452E−06 −2.3630E−06 A14 = −1.1992E−06  1.3750E−07 4.7790E−08  8.6952E−08 A16 = 4.7557E−08 −5.0640E−09 −5.6744E−10  −2.1038E−09 A18 = −9.7938E−10 9.1195E−11 1.6279E−12  3.1963E−11 A20 =  8.2089E−12 −6.5807E−133.4295E−14 −2.7603E−13

In the 2nd embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 2nd embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 3 and Table 4 asthe following values and satisfy the following conditions:

2nd Embodiment f [mm] 7.10 R9/f −0.60 Fno 2.00 (R15 + R16)/(R15 − R16)1.16 HFOV [deg.] 46.5 f/f1 0.64 V5 28.3 f/f2 −0.37 V6 56.0 f/f3 0.54(Vi/Ni)min 11.65 f/f4 0.20 Vmin 19.5 f/f5 −0.35 ΣCT/ΣAT 1.46 f/f6 0.29CT1/CT3 0.99 f/f7 0.64 CTmax/CTmin 2.09 f/f8 −1.28 (T12 + T34)/T23 12.47f/ImgH 0.90 (T12 + T34 + T45 + 13.53 f1/f3 0.85 T67 + T78)/(T23 + T56)(T67 + T78)/CT7 2.44 f3/f7 1.19 (T67 − T78)/(T67 + T78) −0.09 |f7/f8|1.98 TD/T45 18.00 ImgH/BL 6.23 TD/(T67 + T78) 4.89 Y82/Y11 3.59 TL [mm]9.07 Yc62/Yc61 1.04 TL/f 1.28 Yc72/Yc71 1.16 TL/ImgH 1.14 Yc82/Y82 0.42R5/R6 0.04

3rd Embodiment

FIG. 5 is a schematic view of an imaging apparatus according to the 3rdembodiment of the present disclosure. FIG. 6 shows, in order from leftto right, spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus of the 3rd embodiment. In FIG.5 , the imaging apparatus according to the 3rd embodiment includes aphotographing optical lens assembly (its reference number is omitted)and an image sensor 396. The photographing optical lens assemblyincludes, in order from an object side to an image side along an opticalpath, an aperture stop 300, a first lens element 310, a second lenselement 320, a stop 301, a third lens element 330, a fourth lens element340, a fifth lens element 350, a sixth lens element 360, a seventh lenselement 370, an eighth lens element 380, a filter 390 and an imagesurface 395, wherein the image sensor 396 is disposed on the imagesurface 395 of the photographing optical lens assembly. Thephotographing optical lens assembly includes eight lens elements (310,320, 330, 340, 350, 360, 370, 380) without additional one or more lenselements inserted between the first lens element 310 and the eighth lenselement 380.

The first lens element 310 with positive refractive power has anobject-side surface 311 being convex in a paraxial region thereof and animage-side surface 312 being concave in a paraxial region thereof. Thefirst lens element 310 is made of a plastic material, and has theobject-side surface 311 and the image-side surface 312 being bothaspheric. Furthermore, the object-side surface 311 of the first lenselement 310 includes an inflection point in an off-axis region thereof,and the image-side surface 312 of the first lens element 310 includes aninflection point in an off-axis region thereof.

The second lens element 320 with negative refractive power has anobject-side surface 321 being convex in a paraxial region thereof and animage-side surface 322 being concave in a paraxial region thereof. Thesecond lens element 320 is made of a plastic material, and has theobject-side surface 321 and the image-side surface 322 being bothaspheric. Furthermore, the object-side surface 321 of the second lenselement 320 includes two inflection points in an off-axis regionthereof, and the image-side surface 322 of the second lens element 320includes three inflection points in an off-axis region thereof.

The third lens element 330 with positive refractive power has anobject-side surface 331 being convex in a paraxial region thereof and animage-side surface 332 being convex in a paraxial region thereof. Thethird lens element 330 is made of a plastic material, and has theobject-side surface 331 and the image-side surface 332 being bothaspheric. Furthermore, the image-side surface 332 of the third lenselement 330 includes an inflection point and a critical point in anoff-axis region thereof.

The fourth lens element 340 with positive refractive power has anobject-side surface 341 being concave in a paraxial region thereof andan image-side surface 342 being convex in a paraxial region thereof. Thefourth lens element 340 is made of a plastic material, and has theobject-side surface 341 and the image-side surface 342 being bothaspheric. Furthermore, the image-side surface 342 of the fourth lenselement 340 includes an inflection point in an off-axis region thereof.

The fifth lens element 350 with negative refractive power has anobject-side surface 351 being concave in a paraxial region thereof andan image-side surface 352 being convex in a paraxial region thereof. Thefifth lens element 350 is made of a plastic material, and has theobject-side surface 351 and the image-side surface 352 being bothaspheric. Furthermore, the image-side surface 352 of the fifth lenselement 350 includes two inflection points in an off-axis regionthereof.

The sixth lens element 360 with positive refractive power has anobject-side surface 361 being convex in a paraxial region thereof and animage-side surface 362 being concave in a paraxial region thereof. Thesixth lens element 360 is made of a plastic material, and has theobject-side surface 361 and the image-side surface 362 being bothaspheric. Furthermore, the object-side surface 361 of the sixth lenselement 360 includes two inflection points and a critical point in anoff-axis region thereof, and the image-side surface 362 of the sixthlens element 360 includes an inflection point and a critical point in anoff-axis region thereof.

The seventh lens element 370 with positive refractive power has anobject-side surface 371 being convex in a paraxial region thereof and animage-side surface 372 being concave in a paraxial region thereof. Theseventh lens element 370 is made of a plastic material, and has theobject-side surface 371 and the image-side surface 372 being bothaspheric. Furthermore, the object-side surface 371 of the seventh lenselement 370 includes four inflection points and a critical point in anoff-axis region thereof, and the image-side surface 372 of the seventhlens element 370 includes two inflection points and a critical point inan off-axis region thereof.

The eighth lens element 380 with negative refractive power has anobject-side surface 381 being convex in a paraxial region thereof and animage-side surface 382 being concave in a paraxial region thereof. Theeighth lens element 380 is made of a plastic material, and has theobject-side surface 381 and the image-side surface 382 being bothaspheric. Furthermore, the object-side surface 381 of the eighth lenselement 380 includes four inflection points and a critical point in anoff-axis region thereof, and the image-side surface 382 of the eighthlens element 380 includes three inflection points and a critical pointin an off-axis region thereof.

The filter 390 is made of a glass material and disposed between theeighth lens element 380 and the image surface 395 and will not affect afocal length of the photographing optical lens assembly.

The detailed optical data of the 3rd embodiment are shown in Table 5 andthe aspheric surface data are shown in Table 6 below.

TABLE 5 3rd Embodiment f = 6.99 mm, Fno = 2.00, HFOV = 46.2 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano 2000.000 1 Ape. Stop Plano −0.519 2 Lens 1 3.037 ASP 0.631 Plastic1.545 56.1 11.28 3 5.562 ASP 0.335 4 Lens 2 7.450 ASP 0.335 Plastic1.669 19.5 −19.85 5 4.686 ASP 0.382 6 Stop Plano −0.335 7 Lens 3 6.024ASP 0.701 Plastic 1.544 56.0 10.27 8 −74.384 ASP 0.611 9 Lens 4 −89.968ASP 0.410 Plastic 1.669 19.5 210.25 10 −54.973 ASP 0.457 11 Lens 5−3.987 ASP 0.470 Plastic 1.587 28.3 −15.08 12 −7.567 ASP 0.120 13 Lens 63.102 ASP 0.571 Plastic 1.544 56.0 18.47 14 4.197 ASP 0.825 15 Lens 74.356 ASP 0.663 Plastic 1.544 56.0 9.78 16 22.773 ASP 0.614 17 Lens 813.839 ASP 0.706 Plastic 1.544 56.0 −5.66 18 2.474 ASP 0.800 19 FilterPlano 0.210 Glass 1.517 64.2 — 20 Plano 0.310 21 Image Plano — Referencewavelength is 587.6 nm (d-line). Effective radius of Surface 6 (Stop301) is 1.890 mm.

TABLE 6 Aspheric Coefficients Surface # 2 3 4 5 7 8 k =  5.0870E−01−3.3008E+00   0.0000E+00 −1.1033E+01  0.0000E+00 0.0000E+00 A4 =−2.0346E−03 9.3577E−04 −1.8453E−02 −6.9959E−03 −1.3652E−03 1.6464E−04 A6= −9.3633E−04 −9.3218E−04   4.2926E−03  8.3547E−03  1.0179E−02−1.9672E−03  A8 =  1.8547E−04 2.7161E−04 −3.3892E−03 −1.3244E−02−1.4634E−02 3.1072E−03 A10 = −1.2780E−04 −3.4754E−04   2.4717E−03 9.4088E−03  9.6615E−03 −2.2505E−03  A12 = −8.4733E−06 3.1664E−05−1.1178E−03 −3.7090E−03 −3.5339E−03 9.6494E−04 A14 = 7.5236E−06 2.8810E−04  8.1399E−04  6.9613E−04 −2.3729E−04  A16 = −2.8746E−05−7.4307E−05 −5.5667E−05 2.4982E−05 Surface # 9 10 11 12 13 14 k = 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 −1.2302E+01 −4.1942E+00 A4= −1.4657E−02 1.3643E−03 5.2122E−02 1.6645E−02  9.9407E−03 −2.3383E−02A6 = −3.2879E−04 −7.8010E−03  −3.6743E−02  −2.0685E−02  −3.0623E−03 1.3284E−02 A8 = −5.0874E−03 2.7061E−03 1.8276E−02 8.5739E−03 7.4464E−04 −3.9504E−03 A10 =  2.8862E−03 −1.3756E−03  −6.0385E−03 −2.1348E−03  −2.5167E−04  6.5659E−04 A12 = −8.2588E−04 5.5064E−041.3015E−03 3.5473E−04  4.9020E−05 −6.7997E−05 A14 =  1.0218E−04−1.3660E−04  −1.7643E−04  −3.6538E−05  −5.3401E−06  4.4507E−06 A16 =−2.8403E−06 1.8401E−05 1.3838E−05 2.0366E−06  3.2761E−07 −1.7735E−07 A18= −9.6231E−07  −4.8985E−07  −4.6234E−08  −1.0519E−08  3.8987E−09 A20 = 1.3682E−10 −3.6067E−11 Surface# 15 16 17 18 k = −1.0055E+00 7.9863E+000.0000E+00 −6.5198E+00 A4 =  2.7857E−03 2.6335E−02 −4.6757E−02 −2.2919E−02 A6 = −5.0483E−03 −8.3526E−03  9.4978E−03  4.1827E−03 A8 = 8.8774E−04 1.1187E−03 −1.0180E−03  −4.7277E−04 A10 = −1.4995E−04−1.0037E−04  6.6009E−05  3.4883E−05 A12 =  1.8112E−05 7.2240E−06−2.7116E−06  −1.7339E−06 A14 = −1.2633E−06 −4.2205E−07  6.9271E−08 5.8021E−08 A16 =  4.9067E−08 1.8110E−08 −9.4488E−10  −1.2827E−09 A18 =−9.9339E−10 −5.0897E−10  6.5539E−13  1.7944E−11 A20 =  8.1918E−128.1925E−12 1.9904E−13 −1.4403E−13

In the 3rd embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 3rd embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 5 and Table 6 asthe following values and satisfy the following conditions:

3rd Embodiment f [mm] 6.99 R9/f −0.57 Fno 2.00 (R15 + R16)/(R15 − R16)1.44 HFOV [deg.] 46.2 f/f1 0.62 V5 28.3 f/f2 −0.35 V6 56.0 f/f3 0.68(Vi/Ni)min 11.65 f/f4 0.03 Vmin 19.5 f/f5 −0.46 ΣCT/ΣAT 1.49 f/f6 0.38CT1/CT3 0.90 f/f7 0.71 CTmax/CTmin 2.11 f/f8 −1.23 (T12 + T34)/T23 20.13f/ImgH 0.88 (T12 + T34 + T45 + 17.02 f1/f3 1.10 T67 + T78)/(T23 + T56)(T67 + T78)/CT7 2.17 f3/f7 1.05 (T67 − T78)/(T67 + T78) 0.15 |f7/f8|1.73 TD/T45 16.40 ImgH/BL 6.01 TD/(T67 + T78) 5.21 Y82/Y11 3.62 TL [mm]8.82 Yc62/Yc61 1.09 TL/f 1.26 Yc72/Yc71 1.11 TL/ImgH 1.11 Yc82/Y82 0.44R5/R6 −0.08

4th Embodiment

FIG. 7 is a schematic view of an imaging apparatus according to the 4thembodiment of the present disclosure. FIG. 8 shows, in order from leftto right, spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus of the 4th embodiment. In FIG.7 , the imaging apparatus according to the 4th embodiment includes aphotographing optical lens assembly (its reference number is omitted)and an image sensor 496. The photographing optical lens assemblyincludes, in order from an object side to an image side along an opticalpath, an aperture stop 400, a first lens element 410, a second lenselement 420, a stop 401, a third lens element 430, a fourth lens element440, a fifth lens element 450, a sixth lens element 460, a seventh lenselement 470, an eighth lens element 480, a filter 490 and an imagesurface 495, wherein the image sensor 496 is disposed on the imagesurface 495 of the photographing optical lens assembly. Thephotographing optical lens assembly includes eight lens elements (410,420, 430, 440, 450, 460, 470, 480) without additional one or more lenselements inserted between the first lens element 410 and the eighth lenselement 480.

The first lens element 410 with positive refractive power has anobject-side surface 411 being convex in a paraxial region thereof and animage-side surface 412 being concave in a paraxial region thereof. Thefirst lens element 410 is made of a plastic material, and has theobject-side surface 411 and the image-side surface 412 being bothaspheric. Furthermore, the object-side surface 411 of the first lenselement 410 includes an inflection point in an off-axis region thereof,and the image-side surface 412 of the first lens element 410 includes aninflection point in an off-axis region thereof.

The second lens element 420 with positive refractive power has anobject-side surface 421 being convex in a paraxial region thereof and animage-side surface 422 being concave in a paraxial region thereof. Thesecond lens element 420 is made of a plastic material, and has theobject-side surface 421 and the image-side surface 422 being bothaspheric. Furthermore, the object-side surface 421 of the second lenselement 420 includes two inflection points in an off-axis regionthereof, and the image-side surface 422 of the second lens element 420includes an inflection point in an off-axis region thereof.

The third lens element 430 with positive refractive power has anobject-side surface 431 being convex in a paraxial region thereof and animage-side surface 432 being convex in a paraxial region thereof. Thethird lens element 430 is made of a plastic material, and has theobject-side surface 431 and the image-side surface 432 being bothaspheric. Furthermore, the image-side surface 432 of the third lenselement 430 includes an inflection point and a critical point in anoff-axis region thereof.

The fourth lens element 440 with positive refractive power has anobject-side surface 441 being convex in a paraxial region thereof and animage-side surface 442 being convex in a paraxial region thereof. Thefourth lens element 440 is made of a plastic material, and has theobject-side surface 441 and the image-side surface 442 being bothaspheric. Furthermore, the object-side surface 441 of the fourth lenselement 440 includes two inflection points and a critical point in anoff-axis region thereof, and the image-side surface 442 of the fourthlens element 440 includes three inflection points and two criticalpoints in an off-axis region thereof.

The fifth lens element 450 with negative refractive power has anobject-side surface 451 being concave in a paraxial region thereof andan image-side surface 452 being convex in a paraxial region thereof. Thefifth lens element 450 is made of a plastic material, and has theobject-side surface 451 and the image-side surface 452 being bothaspheric. Furthermore, the image-side surface 452 of the fifth lenselement 450 includes three inflection points in an off-axis regionthereof.

The sixth lens element 460 with positive refractive power has anobject-side surface 461 being convex in a paraxial region thereof and animage-side surface 462 being concave in a paraxial region thereof. Thesixth lens element 460 is made of a plastic material, and has theobject-side surface 461 and the image-side surface 462 being bothaspheric. Furthermore, the object-side surface 461 of the sixth lenselement 460 includes two inflection points and a critical point in anoff-axis region thereof, and the image-side surface 462 of the sixthlens element 460 includes an inflection point and a critical point in anoff-axis region thereof.

The seventh lens element 470 with positive refractive power has anobject-side surface 471 being convex in a paraxial region thereof and animage-side surface 472 being concave in a paraxial region thereof. Theseventh lens element 470 is made of a plastic material, and has theobject-side surface 471 and the image-side surface 472 being bothaspheric. Furthermore, the object-side surface 471 of the seventh lenselement 470 includes four inflection points and a critical point in anoff-axis region thereof, and the image-side surface 472 of the seventhlens element 470 includes two inflection points and a critical point inan off-axis region thereof.

The eighth lens element 480 with negative refractive power has anobject-side surface 481 being convex in a paraxial region thereof and animage-side surface 482 being concave in a paraxial region thereof. Theeighth lens element 480 is made of a plastic material, and has theobject-side surface 481 and the image-side surface 482 being bothaspheric. Furthermore, the object-side surface 481 of the eighth lenselement 480 includes four inflection points and a critical point in anoff-axis region thereof, and the image-side surface 482 of the eighthlens element 480 includes two inflection points and a critical point inan off-axis region thereof.

The filter 490 is made of a glass material and disposed between theeighth lens element 480 and the image surface 495 and will not affect afocal length of the photographing optical lens assembly.

The detailed optical data of the 4th embodiment are shown in Table 7 andthe aspheric surface data are shown in Table 8 below.

TABLE 7 4th Embodiment f = 6.92 mm, Fno = 1.95, HFOV = 47.4 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano infinity 1 Ape. Stop Plano −0.520 2 Lens 1 3.025 ASP 0.617 Plastic1.529 58.1 12.79 3 5.083 ASP 0.273 4 Lens 2 6.663 ASP 0.335 Plastic1.701 14.9 367.45 5 6.698 ASP 0.308 6 Stop Plano −0.229 7 Lens 3 13.746ASP 0.771 Plastic 1.529 58.1 17.73 8 −28.965 ASP 0.603 9 Lens 4 384.615ASP 0.357 Plastic 1.701 14.9 226.49 10 −270.270 ASP 0.397 11 Lens 5−4.124 ASP 0.540 Plastic 1.614 26.0 −16.21 12 −7.394 ASP 0.135 13 Lens 63.280 ASP 0.597 Plastic 1.534 55.9 20.02 14 4.432 ASP 0.787 15 Lens 74.293 ASP 0.690 Plastic 1.534 55.9 9.73 16 23.317 ASP 0.669 17 Lens 817.343 ASP 0.653 Plastic 1.534 55.9 −5.87 18 2.618 ASP 0.800 19 FilterPlano 0.210 Glass 1.517 64.2 — 20 Plano 0.305 21 Image Plano — Referencewavelength is 587.6 nm (d-line). Effective radius of Surface 6 (Stop401) is 1.895 mm.

TABLE 8 Aspheric Coefficients Surface # 2 3 4 5 7 8 k =  4.7794E−01−4.6342E+00 −2.3512E−01 −8.3218E+00 1.9389E+01 −1.6671E+01 A4 =−2.0099E−03  2.5112E−03 −1.0316E−02  7.5911E−03 2.0964E−02 −1.0546E−03A6 = −2.9098E−03 −1.1234E−02 −1.4852E−02 −2.1102E−02 −1.8738E−02  3.3293E−04 A8 =  1.6022E−03  1.1041E−02  1.3502E−02  8.8839E−036.4343E−03  7.2179E−04 A10 = −5.1804E−04 −5.3315E−03 −4.8627E−03 2.9118E−03 2.5567E−03 −1.5345E−03 A12 =  2.9442E−05  1.1565E−03 4.7934E−04 −3.6096E−03 −2.7704E−03   9.8342E−04 A14 = −9.2007E−05 1.4113E−04  1.0981E−03 7.9431E−04 −2.7305E−04 A16 = −2.6647E−05−1.1130E−04 −7.5663E−05   2.8542E−05 Surface # 9 10 11 12 13 14 k =9.9000E+01 −9.9000E+01 −3.3755E−01 −5.2340E−02 −1.2302E+01 −4.0423E+00A4 = −1.8843E−02   1.1250E−02  6.0108E−02  1.7067E−02  9.7025E−03−2.1823E−02 A6 = 5.0690E−03 −2.4690E−02 −5.2049E−02 −2.1978E−02−2.6186E−03  1.2400E−02 A8 = −7.6602E−03   1.9831E−02  3.1309E−02 9.4650E−03  4.9563E−04 −3.7168E−03 A10 = 2.9108E−03 −1.0915E−02−1.1685E−02 −2.4450E−03 −1.8582E−04  6.2018E−04 A12 = −5.3195E−04  3.5875E−03  2.6919E−03  4.1727E−04  3.9000E−05 −6.4483E−05 A14 =3.0871E−05 −6.8615E−04 −3.7427E−04 −4.3758E−05 −4.4280E−06  4.2448E−06A16 = 2.1669E−06  7.0577E−05  2.8926E−05  2.4735E−06  2.7886E−07−1.7054E−07 A18 = −2.9701E−06 −9.6327E−07 −5.6885E−08 −9.1150E−09 3.7928E−09 A20 =  1.2017E−10 −3.5655E−11 Surface # 15 16 17 18 k =−1.0079E+00 8.1040E+00  4.8613E−01 −6.0744E+00 A4 =  3.0771E−032.5717E−02 −4.4613E−02 −2.3028E−02 A6 = −5.5287E−03 −7.8438E−03  8.7943E−03  4.1106E−03 A8 =  1.0549E−03 9.4492E−04 −9.0648E−04−4.4952E−04 A10 = −1.8319E−04 −6.5350E−05   5.5978E−05  3.1364E−05 A12 = 2.2032E−05 2.8848E−06 −2.1748E−06 −1.4323E−06 A14 = −1.5359E−06−8.5212E−08   5.3304E−08  4.2284E−08 A16 =  5.9999E−08 1.7016E−09−7.9078E−10 −7.7286E−10 A18 = −1.2265E−09 −2.1923E−11   6.3506E−12 7.9323E−12 A20 =  1.0234E−11 1.4364E−13 −2.0355E−14 −3.4937E−14

In the 4th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 4th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 7 and Table 8 asthe following values and satisfy the following conditions:

4th Embodiment f [mm] 6.92 R9/f −0.60 Fno 1.95 (R15 + R16)/(R15 − R16)1.36 HFOV [deg.] 47.4 f/f1 0.54 V5 26.0 f/f2 0.02 V6 55.9 f/f3 0.39(Vi/Ni)min 8.76 f/f4 0.03 Vmin 14.9 f/f5 −0.43 ΣCT/ΣAT 1.55 f/f6 0.35CT1/CT3 0.80 f/f7 0.71 CTmax/CTmin 2.30 f/f8 −1.18 (T12 + T34)/T23 11.09f/ImgH 0.87 (T12 + T34 + T45 + 12.75 f1/f3 0.72 T67 + T78)/(T23 + T56)(T67 + T78)/CT7 2.11 f3/f7 1.82 (T67 − T78)/(T67 + T78) 0.08 |f7/f8|1.66 TD/T45 18.90 ImgH/BL 6.03 TD/(T67 + T78) 5.15 Y82/Y11 3.56 TL [mm]8.82 Yc62/Yc61 1.09 TL/f 1.27 Yc72/Yc71 1.12 TL/ImgH 1.11 Yc82/Y82 0.44R5/R6 −0.47

5th Embodiment

FIG. 9 is a schematic view of an imaging apparatus according to the 5thembodiment of the present disclosure. FIG. 10 shows, in order from leftto right, spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus of the 5th embodiment. In FIG.9 , the imaging apparatus according to the 5th embodiment includes aphotographing optical lens assembly (its reference number is omitted)and an image sensor 596. The photographing optical lens assemblyincludes, in order from an object side to an image side along an opticalpath, an aperture stop 500, a first lens element 510, a second lenselement 520, a stop 501, a third lens element 530, a fourth lens element540, a fifth lens element 550, a sixth lens element 560, a seventh lenselement 570, an eighth lens element 580, a filter 590 and an imagesurface 595, wherein the image sensor 596 is disposed on the imagesurface 595 of the photographing optical lens assembly. Thephotographing optical lens assembly includes eight lens elements (510,520, 530, 540, 550, 560, 570, 580) without additional one or more lenselements inserted between the first lens element 510 and the eighth lenselement 580.

The first lens element 510 with positive refractive power has anobject-side surface 511 being convex in a paraxial region thereof and animage-side surface 512 being concave in a paraxial region thereof. Thefirst lens element 510 is made of a plastic material, and has theobject-side surface 511 and the image-side surface 512 being bothaspheric. Furthermore, the object-side surface 511 of the first lenselement 510 includes an inflection point in an off-axis region thereof,and the image-side surface 512 of the first lens element 510 includes aninflection point in an off-axis region thereof.

The second lens element 520 with negative refractive power has anobject-side surface 521 being convex in a paraxial region thereof and animage-side surface 522 being concave in a paraxial region thereof. Thesecond lens element 520 is made of a plastic material, and has theobject-side surface 521 and the image-side surface 522 being bothaspheric. Furthermore, the object-side surface 521 of the second lenselement 520 includes two inflection points in an off-axis regionthereof, and the image-side surface 522 of the second lens element 520includes three inflection points in an off-axis region thereof.

The third lens element 530 with positive refractive power has anobject-side surface 531 being convex in a paraxial region thereof and animage-side surface 532 being convex in a paraxial region thereof. Thethird lens element 530 is made of a plastic material, and has theobject-side surface 531 and the image-side surface 532 being bothaspheric. Furthermore, the image-side surface 532 of the third lenselement 530 includes an inflection point and a critical point in anoff-axis region thereof.

The fourth lens element 540 with negative refractive power has anobject-side surface 541 being concave in a paraxial region thereof andan image-side surface 542 being concave in a paraxial region thereof.The fourth lens element 540 is made of a plastic material, and has theobject-side surface 541 and the image-side surface 542 being bothaspheric. Furthermore, the image-side surface 542 of the fourth lenselement 540 includes two inflection points and a critical point in anoff-axis region thereof.

The fifth lens element 550 with positive refractive power has anobject-side surface 551 being concave in a paraxial region thereof andan image-side surface 552 being convex in a paraxial region thereof. Thefifth lens element 550 is made of a plastic material, and has theobject-side surface 551 and the image-side surface 552 being bothaspheric. Furthermore, the image-side surface 552 of the fifth lenselement 550 includes two inflection points in an off-axis regionthereof.

The sixth lens element 560 with negative refractive power has anobject-side surface 561 being convex in a paraxial region thereof and animage-side surface 562 being concave in a paraxial region thereof. Thesixth lens element 560 is made of a plastic material, and has theobject-side surface 561 and the image-side surface 562 being bothaspheric. Furthermore, the object-side surface 561 of the sixth lenselement 560 includes two inflection points and a critical point in anoff-axis region thereof, and the image-side surface 562 of the sixthlens element 560 includes an inflection point and a critical point in anoff-axis region thereof.

The seventh lens element 570 with positive refractive power has anobject-side surface 571 being convex in a paraxial region thereof and animage-side surface 572 being concave in a paraxial region thereof. Theseventh lens element 570 is made of a plastic material, and has theobject-side surface 571 and the image-side surface 572 being bothaspheric. Furthermore, the object-side surface 571 of the seventh lenselement 570 includes two inflection points and a critical point in anoff-axis region thereof, and the image-side surface 572 of the seventhlens element 570 includes two inflection points and a critical point inan off-axis region thereof.

The eighth lens element 580 with negative refractive power has anobject-side surface 581 being convex in a paraxial region thereof and animage-side surface 582 being concave in a paraxial region thereof. Theeighth lens element 580 is made of a plastic material, and has theobject-side surface 581 and the image-side surface 582 being bothaspheric. Furthermore, the object-side surface 581 of the eighth lenselement 580 includes four inflection points and a critical point in anoff-axis region thereof, and the image-side surface 582 of the eighthlens element 580 includes three inflection points and a critical pointin an off-axis region thereof.

The filter 590 is made of a glass material and disposed between theeighth lens element 580 and the image surface 595 and will not affect afocal length of the photographing optical lens assembly.

The detailed optical data of the 5th embodiment are shown in Table 9 andthe aspheric surface data are shown in Table 10 below.

TABLE 9 5th Embodiment f = 6.99 mm, Fno = 2.00, HFOV = 46.5 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano 2000.000 1 Ape. Stop Plano −0.523 2 Lens 1 3.016 ASP 0.659 Plastic1.529 58.1 11.01 3 5.780 ASP 0.316 4 Lens 2 7.145 ASP 0.335 Plastic1.656 21.3 −19.08 5 4.464 ASP 0.410 6 Stop Plano −0.358 7 Lens 3 5.686ASP 0.692 Plastic 1.529 58.1 10.43 8 −177.874 ASP 0.590 9 Lens 4−301.205 ASP 0.430 Plastic 1.669 19.5 −181.11 10 202.840 ASP 0.459 11Lens 5 −4.328 ASP 0.559 Plastic 1.566 37.4 160.02 12 −4.323 ASP 0.106 13Lens 6 4.382 ASP 0.541 Plastic 1.544 56.0 −122.70 14 3.933 ASP 0.757 15Lens 7 4.318 ASP 0.677 Plastic 1.544 56.0 9.77 16 21.778 ASP 0.627 17Lens 8 13.925 ASP 0.699 Plastic 1.534 55.9 −5.77 18 2.479 ASP 0.800 19Filter Plano 0.145 Glass 1.517 64.2 — 20 Plano 0.371 21 Image Plano —Reference wavelength is 587.6 nm (d-line). Effective radius of Surface 6(Stop 501) is 1,892 mm.

TABLE 10 Aspheric Coefficients Surface # 2 3 4 5 7 8 k =  5.0182E−01−4.4897E+00 −9.4924E−01 −1.0254E+01  8.0163E−02 9.9000E+01 A4 =−2.1978E−03  1.4306E−03 −1.6806E−02  9.5793E−04  6.0575E−03 2.3242E−04A6 = −6.4630E−04 −2.3696E−03 −1.9341E−03 −7.8317E−03 −2.7215E−03−1.2842E−03  A8 = −4.3385E−05  1.2911E−03  3.3918E−03  1.5076E−03−4.1085E−03 2.9628E−03 A10 = −4.3382E−05 −7.8537E−04 −1.5630E−03 1.4978E−03  4.4577E−03 −2.3007E−03  A12 = −2.1956E−05  1.2467E−04 2.6479E−04 −1.1367E−03 −1.9540E−03 9.8372E−04 A14 = −1.8196E−07 3.5450E−05  3.5446E−04  4.3179E−04 −2.3491E−04  A16 = −9.5963E−06−4.0090E−05 −3.7307E−05 2.4149E−05 Surface # 9 10 11 12 13 14 k = 9.9000E+01 −9.9000E+01 4.7211E−01 −5.4982E+00 −1.2693E+01 −4.9577E+00A4 = −2.2270E−02 −1.1128E−02 2.2268E−02  1.7568E−02  1.0001E−02−2.4035E−02 A6 =  2.2657E−03 −3.8575E−03 −1.1623E−02  −1.6872E−02−2.6428E−03  1.3514E−02 A8 = −4.8938E−03  3.0781E−03 5.6177E−03 5.9457E−03  4.0171E−04 −4.0379E−03 A10 =  2.3547E−03 −2.2292E−03−1.8937E−03  −1.3450E−03 −1.5048E−04  6.8029E−04 A12 = −6.2373E−04 9.0821E−04 4.3657E−04  2.2742E−04  3.3192E−05 −7.1616E−05 A14 = 6.7973E−05 −2.1193E−04 −6.5024E−05  −2.5189E−05 −3.9104E−06  4.7615E−06A16 = −6.2532E−07  2.6504E−05 5.7144E−06  1.5151E−06  2.5286E−07−1.9236E−07 A18 = −1.3122E−06 −2.3101E−07  −3.6823E−08 −8.4114E−09 4.2806E−09 A20 =  1.1195E−10 −4.0062E−11 Surface # 15 16 17 18 k =−1.0199E+00 8.1285E+00 −5.3656E−02 −6.3098E+00 A4 =  2.7629E−032.5326E−02 −4.6647E−02 −2.2570E−02 A6 = −5.1072E−03 −7.4254E−03  9.4215E−03  3.8582E−03 A8 =  9.1489E−04 7.9286E−04 −1.0018E−03−4.0113E−04 A10 = −1.5687E−04 −4.0146E−05   6.4434E−05  2.6663E−05 A12 = 1.9077E−05 5.9918E−07 −2.6478E−06 −1.1683E−06 A14 = −1.3378E−063.6185E−08  7.0278E−08  3.3353E−08 A16 =  5.2269E−08 −2.0729E−09 −1.1692E−09 −5.9317E−10 A18 = −1.0649E−09 4.1682E−11  1.1113E−11 5.9505E−12 A20 =  8.8396E−12 −3.0429E−13  −4.6127E−14 −2.5712E−14

In the 5th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 5th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 9 and Table 10as the following values and satisfy the following conditions:

5th Embodiment f [mm] 6.99 R9/f −0.62 Fno 2.00 (R15 + R16)/(R15 − R16)1.43 HFOV [deg.] 46.5 f/f1 0.64 V5 37.4 f/f2 −0.37 V6 56.0 f/f3 0.67(Vi/Ni)min 11.65 f/f4 −0.04 Vmin 19.5 f/f5 0.04 ΣCT/ΣAT 1.58 f/f6 −0.06CT1/CT3 0.95 f/f7 0.72 CTmax/CTmin 2.09 f/f8 −1.21 (T12 + T34)/T23 17.42f/ImgH 0.88 (T12 + T34 + T45 + 17.40 f1/f3 1.06 T67 + T78)/(T23 + T56)(T67 + T78)/CT7 2.04 f3/f7 1.07 (T67 − T78)/(T67 + T78) 0.09 |f7/f8|1.69 TD/T45 16.34 ImgH/BL 6.03 TD/(T67 + T78) 5.42 Y82/Y11 3.60 TL [mm]8.81 Yc62/Yc61 1.10 TL/f 1.26 Yc72/Yc71 1.11 TL/ImgH 1.11 Yc82/Y82 0.43R5/R6 −0.03

6th Embodiment

FIG. 11 is a schematic view of an imaging apparatus according to the 6thembodiment of the present disclosure. FIG. 12 shows, in order from leftto right, spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus of the 6th embodiment. In FIG.11 , the imaging apparatus according to the 6th embodiment includes aphotographing optical lens assembly (its reference number is omitted)and an image sensor 696. The photographing optical lens assemblyincludes, in order from an object side to an image side along an opticalpath, an aperture stop 600, a first lens element 610, a second lenselement 620, a third lens element 630, a fourth lens element 640, afifth lens element 650, a sixth lens element 660, a seventh lens element670, an eighth lens element 680, a filter 690 and an image surface 695,wherein the image sensor 696 is disposed on the image surface 695 of thephotographing optical lens assembly. The photographing optical lensassembly includes eight lens elements (610, 620, 630, 640, 650, 660,670, 680) without additional one or more lens elements inserted betweenthe first lens element 610 and the eighth lens element 680.

The first lens element 610 with positive refractive power has anobject-side surface 611 being convex in a paraxial region thereof and animage-side surface 612 being concave in a paraxial region thereof. Thefirst lens element 610 is made of a plastic material, and has theobject-side surface 611 and the image-side surface 612 being bothaspheric. Furthermore, the object-side surface 611 of the first lenselement 610 includes an inflection point in an off-axis region thereof,and the image-side surface 612 of the first lens element 610 includestwo inflection points in an off-axis region thereof.

The second lens element 620 with negative refractive power has anobject-side surface 621 being convex in a paraxial region thereof and animage-side surface 622 being concave in a paraxial region thereof. Thesecond lens element 620 is made of a plastic material, and has theobject-side surface 621 and the image-side surface 622 being bothaspheric. Furthermore, the object-side surface 621 of the second lenselement 620 includes two inflection points and two critical points in anoff-axis region thereof, and the image-side surface 622 of the secondlens element 620 includes three inflection points in an off-axis regionthereof.

The third lens element 630 with positive refractive power has anobject-side surface 631 being convex in a paraxial region thereof and animage-side surface 632 being concave in a paraxial region thereof. Thethird lens element 630 is made of a plastic material, and has theobject-side surface 631 and the image-side surface 632 being bothaspheric. Furthermore, the object-side surface 631 of the third lenselement 630 includes two inflection points in an off-axis regionthereof, and the image-side surface 632 of the third lens element 630includes two inflection points and a critical point in an off-axisregion thereof.

The fourth lens element 640 with positive refractive power has anobject-side surface 641 being convex in a paraxial region thereof and animage-side surface 642 being concave in a paraxial region thereof. Thefourth lens element 640 is made of a plastic material, and has theobject-side surface 641 and the image-side surface 642 being bothaspheric. Furthermore, the object-side surface 641 of the fourth lenselement 640 includes an inflection point and a critical point in anoff-axis region thereof, and the image-side surface 642 of the fourthlens element 640 includes two inflection points and a critical point inan off-axis region thereof.

The fifth lens element 650 with negative refractive power has anobject-side surface 651 being concave in a paraxial region thereof andan image-side surface 652 being convex in a paraxial region thereof. Thefifth lens element 650 is made of a plastic material, and has theobject-side surface 651 and the image-side surface 652 being bothaspheric. Furthermore, the object-side surface 651 of the fifth lenselement 650 includes two inflection points in an off-axis regionthereof, and the image-side surface 652 of the fifth lens element 650includes two inflection points in an off-axis region thereof.

The sixth lens element 660 with positive refractive power has anobject-side surface 661 being convex in a paraxial region thereof and animage-side surface 662 being concave in a paraxial region thereof. Thesixth lens element 660 is made of a plastic material, and has theobject-side surface 661 and the image-side surface 662 being bothaspheric. Furthermore, the object-side surface 661 of the sixth lenselement 660 includes two inflection points and a critical point in anoff-axis region thereof, and the image-side surface 662 of the sixthlens element 660 includes an inflection point and a critical point in anoff-axis region thereof.

The seventh lens element 670 with positive refractive power has anobject-side surface 671 being convex in a paraxial region thereof and animage-side surface 672 being convex in a paraxial region thereof. Theseventh lens element 670 is made of a plastic material, and has theobject-side surface 671 and the image-side surface 672 being bothaspheric. Furthermore, the object-side surface 671 of the seventh lenselement 670 includes two inflection points and a critical point in anoff-axis region thereof, and the image-side surface 672 of the seventhlens element 670 includes two inflection points and two critical pointsin an off-axis region thereof.

The eighth lens element 680 with negative refractive power has anobject-side surface 681 being convex in a paraxial region thereof and animage-side surface 682 being concave in a paraxial region thereof. Theeighth lens element 680 is made of a plastic material, and has theobject-side surface 681 and the image-side surface 682 being bothaspheric. Furthermore, the object-side surface 681 of the eighth lenselement 680 includes four inflection points and a critical point in anoff-axis region thereof, and the image-side surface 682 of the eighthlens element 680 includes two inflection points and a critical point inan off-axis region thereof.

The filter 690 is made of a glass material and disposed between theeighth lens element 680 and the image surface 695 and will not affect afocal length of the photographing optical lens assembly.

The detailed optical data of the 6th embodiment are shown in Table 11and the aspheric surface data are shown in Table 12 below.

TABLE 11 6th Embodiment f = 6.69 mm, Fno = 1.80, HFOV = 41.5 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Ape. Stop Plano −0.611  2 Lens 1 3.015 ASP0.817 Plastic 1.545 56.1 8.26 3 8.245 ASP 0.198 4 Lens 2 10.189 ASP0.335 Plastic 1.587 28.3 −8.40 5 3.284 ASP 0.051 6 Lens 3 3.906 ASP0.787 Plastic 1.544 56.0 7.69 7 55.114 ASP 0.636 8 Lens 4 86.834 ASP0.416 Plastic 1.686 18.4 321.39 9 142.965 ASP 0.385 10 Lens 5 −4.724 ASP0.509 Plastic 1.582 30.2 −17.06 11 −9.362 ASP 0.077 12 Lens 6 2.944 ASP0.506 Plastic 1.544 56.0 19.37 13 3.838 ASP 0.700 14 Lens 7 4.382 ASP0.585 Plastic 1.544 56.0 7.92 15 −240.553 ASP 0.540 16 Lens 8 15.952 ASP0.617 Plastic 1.544 56.0 −5.12 17 2.340 ASP 0.800 18 Filter Plano 0.210Glass 1.517 64.2 — 19 Plano 0.278 20 Image Plano — Reference wavelengthis 587.6 nm (d-line).

TABLE 12 Aspheric Coefficients Surface # 2 3 4 5 6 7 k =  5.8585E−01−5.6233E+00 −2.9899E+00 −8.6899E+00 −5.3576E+00 −6.4086E+01 A4 =−2.0553E−03  2.5094E−03 −1.5469E−02 −2.8887E−04 −3.3598E−03 −2.9267E−03A6 = −8.5374E−04 −5.2151E−03 −1.1928E−03 −2.8505E−03  3.3510E−03−2.3078E−03 A8 =  9.4776E−05  3.2967E−03  3.3948E−03 −8.0514E−04−5.7909E−03  3.4195E−03 A10 = −4.2864E−05 −1.6685E−03 −2.1708E−03 6.7523E−04  3.1751E−03 −2.4531E−03 A12 = −1.2489E−05  3.7010E−04 6.3468E−04 −2.3301E−04 −9.9382E−04  9.8585E−04 A14 = −2.5845E−05−6.7060E−05  8.7809E−05  1.9786E−04 −2.1598E−04 A16 =  1.1733E−06−1.2678E−05 −1.6856E−05  1.9357E−05 Surface # 8 9 10 11 12 13 k =−2.9072E+01 −9.9000E+01 −6.1818E−01 −1.6262E+00 −9.1215E+00 −4.5684E+00A4 = −1.5959E−02  7.4230E−03  5.7620E−02  1.8968E−02  3.5108E−03−2.7277E−02 A6 = −7.5269E−03 −2.3199E−02 −4.6361E−02 −2.8864E−02 2.1121E−04  1.7333E−02 A8 =  2.4598E−03  1.7281E−02  2.6305E−02 1.4011E−02 −4.2881E−04 −5.8033E−03 A10 = −1.6808E−03 −9.6731E−03−9.9381E−03 −4.0193E−03 −3.3237E−05  1.1006E−03 A12 =  7.9122E−04 3.4676E−03  2.4442E−03  7.4001E−04  2.8164E−05 −1.3138E−04 A14 =−1.9513E−04 −7.3821E−04 −3.7113E−04 −8.1704E−05 −4.8409E−06  9.9786E−06A16 =  1.7301E−05  8.4142E−05  3.1488E−05  4.8015E−06  3.9941E−07−4.6599E−07 A18 = −3.8688E−06 −1.1445E−06 −1.1418E−07 −1.6061E−08 1.2225E−08 A20 =  2.4996E−10 −1.3890E−10 Surface # 14 15 16 17 k =−7.0677E−01 −9.9000E+01 3.5597E+00 −5.3890E+00 A4 =  4.2068E−03 3.6821E−02 −5.2411E−02  −3.2520E−02 A6 = −7.2445E−03 −1.2677E−021.0563E−02  7.2672E−03 A8 =  1.5452E−03  2.1138E−03 −9.5496E−04 −1.0372E−03 A10 = −2.9292E−04 −2.4925E−04 2.8361E−05  9.6306E−05 A12 = 3.7951E−05  2.2265E−05 2.1017E−06 −5.9170E−06 A14 = −2.8441E−06−1.4136E−06 −2.4278E−07   2.3718E−07 A16 =  1.1910E−07  5.7760E−081.0340E−08 −5.9294E−09 A18 = −2.5965E−09 −1.3375E−09 −2.1475E−10  8.3590E−11 A20 =  2.2950E−11  1.3260E−11 1.8048E−12 −5.0603E−13

In the 6th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 6th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 11 and Table 12as the following values and satisfy the following conditions:

6th Embodiment f [mm] 6.69 R9/f −0.71 Fno 1.80 (R15 + R16)/(R15 − R16)1.34 HFOV [deg.] 41.5 f/f1 0.81 V5 30.2 f/f2 −0.80 V6 56.0 f/f3 0.87(Vi/Ni)min 10.90 f/f4 0.02 Vmin 18.4 f/f5 −0.39 ΣCT/ΣAT 1.77 f/f6 0.35CT1/CT3 1.04 f/f7 0.85 CTmax/CTmin 2.44 f/f8 −1.31 (T12 + T34)/T23 16.35f/ImgH 1.05 (T12 + T34 + T45 + 19.21 f1/f3 1.08 T67 + T78)/(T23 + T56)(T67 + T78)/CT7 2.12 f3/f7 0.97 (T67 − T78)/(T67 + T78) 0.13 |f7/f8|1.55 TD/T45 18.59 ImgH/BL 4.96 TD/(T67 + T78) 5.77 Y82/Y11 2.82 TL [mm]8.45 Yc62/Yc61 1.10 TL/f 1.26 Yc72/Yc71 0.09, 1.08 TL/ImgH 1.32 Yc82/Y820.47 R5/R6 0.07

7th Embodiment

FIG. 13 is a schematic view of an imaging apparatus according to the 7thembodiment of the present disclosure. FIG. 14 shows, in order from leftto right, spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus of the 7th embodiment. In FIG.13 , the imaging apparatus according to the 7th embodiment includes aphotographing optical lens assembly (its reference number is omitted)and an image sensor 796. The photographing optical lens assemblyincludes, in order from an object side to an image side along an opticalpath, an aperture stop 700, a first lens element 710, a second lenselement 720, a stop 701, a third lens element 730, a fourth lens element740, a fifth lens element 750, a sixth lens element 760, a seventh lenselement 770, an eighth lens element 780, a filter 790 and an imagesurface 795, wherein the image sensor 796 is disposed on the imagesurface 795 of the photographing optical lens assembly. Thephotographing optical lens assembly includes eight lens elements (710,720, 730, 740, 750, 760, 770, 780) without additional one or more lenselements inserted between the first lens element 710 and the eighth lenselement 780.

The first lens element 710 with positive refractive power has anobject-side surface 711 being convex in a paraxial region thereof and animage-side surface 712 being concave in a paraxial region thereof. Thefirst lens element 710 is made of a plastic material, and has theobject-side surface 711 and the image-side surface 712 being bothaspheric. Furthermore, the object-side surface 711 of the first lenselement 710 includes an inflection point in an off-axis region thereof,and the image-side surface 712 of the first lens element 710 includes aninflection point in an off-axis region thereof.

The second lens element 720 with negative refractive power has anobject-side surface 721 being convex in a paraxial region thereof and animage-side surface 722 being concave in a paraxial region thereof. Thesecond lens element 720 is made of a plastic material, and has theobject-side surface 721 and the image-side surface 722 being bothaspheric. Furthermore, the object-side surface 721 of the second lenselement 720 includes two inflection points in an off-axis regionthereof, and the image-side surface 722 of the second lens element 720includes three inflection points in an off-axis region thereof.

The third lens element 730 with positive refractive power has anobject-side surface 731 being convex in a paraxial region thereof and animage-side surface 732 being convex in a paraxial region thereof. Thethird lens element 730 is made of a plastic material, and has theobject-side surface 731 and the image-side surface 732 being bothaspheric. Furthermore, the image-side surface 732 of the third lenselement 730 includes an inflection point and a critical point in anoff-axis region thereof.

The fourth lens element 740 with negative refractive power has anobject-side surface 741 being concave in a paraxial region thereof andan image-side surface 742 being convex in a paraxial region thereof. Thefourth lens element 740 is made of a plastic material, and has theobject-side surface 741 and the image-side surface 742 being bothaspheric. Furthermore, the image-side surface 742 of the fourth lenselement 740 includes an inflection point in an off-axis region thereof.

The fifth lens element 750 with negative refractive power has anobject-side surface 751 being concave in a paraxial region thereof andan image-side surface 752 being convex in a paraxial region thereof. Thefifth lens element 750 is made of a plastic material, and has theobject-side surface 751 and the image-side surface 752 being bothaspheric. Furthermore, the image-side surface 752 of the fifth lenselement 750 includes two inflection points in an off-axis regionthereof.

The sixth lens element 760 with positive refractive power has anobject-side surface 761 being convex in a paraxial region thereof and animage-side surface 762 being concave in a paraxial region thereof. Thesixth lens element 760 is made of a plastic material, and has theobject-side surface 761 and the image-side surface 762 being bothaspheric. Furthermore, the object-side surface 761 of the sixth lenselement 760 includes two inflection points and a critical point in anoff-axis region thereof, and the image-side surface 762 of the sixthlens element 760 includes an inflection point and a critical point in anoff-axis region thereof.

The seventh lens element 770 with positive refractive power has anobject-side surface 771 being convex in a paraxial region thereof and animage-side surface 772 being convex in a paraxial region thereof. Theseventh lens element 770 is made of a plastic material, and has theobject-side surface 771 and the image-side surface 772 being bothaspheric. Furthermore, the object-side surface 771 of the seventh lenselement 770 includes four inflection points and a critical point in anoff-axis region thereof, and the image-side surface 772 of the seventhlens element 770 includes three inflection points and two criticalpoints in an off-axis region thereof.

The eighth lens element 780 with negative refractive power has anobject-side surface 781 being concave in a paraxial region thereof andan image-side surface 782 being concave in a paraxial region thereof.The eighth lens element 780 is made of a plastic material, and has theobject-side surface 781 and the image-side surface 782 being bothaspheric. Furthermore, the object-side surface 781 of the eighth lenselement 780 includes three inflection points in an off-axis regionthereof, and the image-side surface 782 of the eighth lens element 780includes two inflection points and a critical point in an off-axisregion thereof.

The filter 790 is made of a glass material and disposed between theeighth lens element 780 and the image surface 795 and will not affect afocal length of the photographing optical lens assembly.

The detailed optical data of the 7th embodiment are shown in Table 13and the aspheric surface data are shown in Table 14 below.

TABLE 13 7th Embodiment f = 6.93 mm, Fno = 2.00, HFOV = 46.4 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano 2000.000 1 Ape. Stop Plano −0.510 2 Lens 1 3.016 ASP0.618 Plastic 1.545 56.1 11.61 3 5.348 ASP 0.362 4 Lens 2 7.183 ASP0.335 Plastic 1.669 19.5 −22.24 5 4.754 ASP 0.371 6 Stop Plano −0.315 7Lens 3 6.657 ASP 0.711 Plastic 1.544 56.0 10.08 8 −30.026 ASP 0.600 9Lens 4 −92.547 ASP 0.362 Plastic 1.669 19.5 −218.23 10 −253.165 ASP0.511 11 Lens 5 −4.054 ASP 0.452 Plastic 1.614 26.0 −15.73 12 −7.287 ASP0.130 13 Lens 6 3.100 ASP 0.602 Plastic 1.566 37.4 17.07 14 4.245 ASP0.891 15 Lens 7 4.683 ASP 0.740 Plastic 1.562 44.6 8.15 16 −194.553 ASP0.572 17 Lens 8 −332.226 ASP 0.600 Plastic 1.566 37.4 −4.93 18 2.817 ASP0.800 19 Filter Plano 0.210 Glass 1.517 64.2 — 20 Plano 0.265 21 ImagePlano — Reference wavelength is 587.6 nm (d-line). Effective radius ofSurface 6 (Stop 701) is 1.890 mm.

TABLE 14 Aspheric Coefficients Surface # 2 3 4 5 7 8 k =  4.8311E−01−3.2906E+00 −6.5001E−01 −1.2490E+01  6.7863E−01 −4.7577E+01 A4 =−2.1264E−03  4.0878E−04 −1.9779E−02 −2.1316E−03  5.9391E−03  2.3008E−03A6 = −8.9466E−04 −1.2798E−04  1.2710E−03 −3.7746E−03 −7.3346E−04−4.3691E−03 A8 =  7.8660E−05 −5.5959E−04  6.6653E−04 −4.4191E−03−8.6569E−03  5.2646E−03 A10 = −6.9728E−05  2.8039E−04  4.5605E−04 6.5554E−03  8.2553E−03 −3.8563E−03 A12 = −2.3746E−05 −1.8765E−04−5.7337E−04 −3.2835E−03 −3.4161E−03  1.6293E−03 A14 =  3.2504E−05 2.0304E−04  7.9226E−04  7.0011E−04 −3.6856E−04 A16 = −2.2498E−05−7.4538E−05 −5.6393E−05  3.4780E−05 Surface# 9 10 11 12 13 14 k = 9.9000E+01 9.9000E+01 −2.2045E−01 5.2687E−02 −1.2333E+01 −4.2621E+00 A4= −1.1400E−02 3.8320E−03  5.2005E−02 1.6428E−02  9.4881E−03 −2.2760E−02A6 = −9.1639E−03 −1.4093E−02  −3.7673E−02 −1.9743E−02  −2.4012E−03 1.2852E−02 A8 =  3.2456E−03 8.1402E−03  1.9633E−02 8.1897E−03 3.7913E−04 −3.8848E−03 A10 = −2.0107E−03 −4.1935E−03  −6.7983E−03−2.0981E−03  −1.4583E−04  6.5937E−04 A12 =  7.6164E−04 1.4088E−03 1.5183E−03 3.5894E−04  3.1430E−05 −6.9967E−05 A14 = −1.5575E−04−2.8182E−04  −2.0895E−04 −3.7494E−05  −3.6068E−06  4.6980E−06 A16 = 1.3432E−05 3.0759E−05  1.6158E−05 2.0918E−06  2.2808E−07 −1.9208E−07A18 = −1.3669E−06  −5.4277E−07 −4.7179E−08  −7.4627E−09  4.3337E−09 A20=  9.8344E−11 −4.1164E−11 Surface # 15 16 17 18 k = −1.0001E+00−9.9000E+01 −9.9000E+01 −6.9417E+00 A4 =  1.2034E−03  2.7784E−02−3.5084E−02 −2.2514E−02 A6 = −4.5709E−03 −7.9801E−03  6.7993E−03 4.0481E−03 A8 =  8.1874E−04  8.7054E−04 −6.4820E−04 −4.3439E−04 A10 =−1.5178E−04 −4.6621E−05  3.4830E−05  2.9240E−05 A12 =  1.9640E−05 9.6463E−07 −1.0925E−06 −1.2807E−06 A14 = −1.4295E−06  2.0331E−08 1.9669E−08  3.6356E−08 A16 =  5.7328E−08 −1.5332E−09 −1.9509E−10−6.4368E−10 A18 = −1.1930E−09  2.9697E−11  1.1910E−12  6.4618E−12 A20 = 1.0089E−11 −1.8557E−13 −6.6992E−15 −2.8139E−14

In the 7th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 7th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 13 and Table 14as the following values and satisfy the following conditions:

7th Embodiment f [mm] 6.93 R9/f −0.58 Fno 2.00 (R15 + R16)/(R15 − R16)0.98 HFOV [deg.] 46.4 f/f1 0.60 V5 26.0 f/f2 −0.31 V6 37.4 f/f3 0.69(Vi/Ni)min 11.65 f/f4 −0.03 Vmin 19.5 f/f5 −0.44 ΣCT/ΣAT 1.42 f/f6 0.41CT1/CT3 0.87 f/f7 0.85 CTmax/CTmin 2.21 f/f8 −1.41 (T12 + T34)/T23 17.18f/ImgH 0.88 (T12 + T34 + T45 + 15.78 f1/f3 1.15 T67 + T78)/(T23 + T56)(T67 + T78)/CT7 1.98 f3/f7 1.24 (T67 − T78)/(T67 + T78) 0.22 |f7/f8|1.65 TD/T45 14.76 ImgH/BL 6.16 TD/(T67 + T78) 5.16 Y82/Y11 3.55 TL [mm]8.82 Yc62/Yc61 1.08 TL/f 1.27 Yc72/Yc71 0.11, 1.04 TL/ImgH 1.12 Yc82/Y820.45 R5/R6 −0.22

8th Embodiment

FIG. 15 is a schematic view of an imaging apparatus according to the 8thembodiment of the present disclosure. FIG. 16 shows, in order from leftto right, spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus of the 8th embodiment. In FIG.15 , the imaging apparatus according to the 8th embodiment includes aphotographing optical lens assembly (its reference number is omitted)and an image sensor 896. The photographing optical lens assemblyincludes, in order from an object side to an image side along an opticalpath, an aperture stop 800, a first lens element 810, a second lenselement 820, a stop 801, a third lens element 830, a fourth lens element840, a fifth lens element 850, a sixth lens element 860, a seventh lenselement 870, an eighth lens element 880, a filter 890 and an imagesurface 895, wherein the image sensor 896 is disposed on the imagesurface 895 of the photographing optical lens assembly. Thephotographing optical lens assembly includes eight lens elements (810,820, 830, 840, 850, 860, 870, 880) without additional one or more lenselements inserted between the first lens element 810 and the eighth lenselement 880.

The first lens element 810 with positive refractive power has anobject-side surface 811 being convex in a paraxial region thereof and animage-side surface 812 being concave in a paraxial region thereof. Thefirst lens element 810 is made of a plastic material, and has theobject-side surface 811 and the image-side surface 812 being bothaspheric. Furthermore, the object-side surface 811 of the first lenselement 810 includes an inflection point in an off-axis region thereof,and the image-side surface 812 of the first lens element 810 includestwo inflection points in an off-axis region thereof.

The second lens element 820 with negative refractive power has anobject-side surface 821 being convex in a paraxial region thereof and animage-side surface 822 being concave in a paraxial region thereof. Thesecond lens element 820 is made of a plastic material, and has theobject-side surface 821 and the image-side surface 822 being bothaspheric. Furthermore, the object-side surface 821 of the second lenselement 820 includes two inflection points in an off-axis regionthereof, and the image-side surface 822 of the second lens element 820includes three inflection points in an off-axis region thereof.

The third lens element 830 with positive refractive power has anobject-side surface 831 being convex in a paraxial region thereof and animage-side surface 832 being convex in a paraxial region thereof. Thethird lens element 830 is made of a plastic material, and has theobject-side surface 831 and the image-side surface 832 being bothaspheric. Furthermore, the image-side surface 832 of the third lenselement 830 includes an inflection point and a critical point in anoff-axis region thereof.

The fourth lens element 840 with positive refractive power has anobject-side surface 841 being concave in a paraxial region thereof andan image-side surface 842 being convex in a paraxial region thereof. Thefourth lens element 840 is made of a plastic material, and has theobject-side surface 841 and the image-side surface 842 being bothaspheric. Furthermore, the image-side surface 842 of the fourth lenselement 840 includes an inflection point in an off-axis region thereof.

The fifth lens element 850 with negative refractive power has anobject-side surface 851 being concave in a paraxial region thereof andan image-side surface 852 being convex in a paraxial region thereof. Thefifth lens element 850 is made of a plastic material, and has theobject-side surface 851 and the image-side surface 852 being bothaspheric. Furthermore, the image-side surface 852 of the fifth lenselement 850 includes two inflection points in an off-axis regionthereof.

The sixth lens element 860 with positive refractive power has anobject-side surface 861 being convex in a paraxial region thereof and animage-side surface 862 being concave in a paraxial region thereof. Thesixth lens element 860 is made of a plastic material, and has theobject-side surface 861 and the image-side surface 862 being bothaspheric. Furthermore, the object-side surface 861 of the sixth lenselement 860 includes two inflection points and a critical point in anoff-axis region thereof, and the image-side surface 862 of the sixthlens element 860 includes an inflection point and a critical point in anoff-axis region thereof.

The seventh lens element 870 with positive refractive power has anobject-side surface 871 being convex in a paraxial region thereof and animage-side surface 872 being concave in a paraxial region thereof. Theseventh lens element 870 is made of a plastic material, and has theobject-side surface 871 and the image-side surface 872 being bothaspheric. Furthermore, the object-side surface 871 of the seventh lenselement 870 includes four inflection points and a critical point in anoff-axis region thereof, and the image-side surface 872 of the seventhlens element 870 includes two inflection points and a critical point inan off-axis region thereof.

The eighth lens element 880 with negative refractive power has anobject-side surface 881 being convex in a paraxial region thereof and animage-side surface 882 being concave in a paraxial region thereof. Theeighth lens element 880 is made of a plastic material, and has theobject-side surface 881 and the image-side surface 882 being bothaspheric. Furthermore, the object-side surface 881 of the eighth lenselement 880 includes four inflection points and a critical point in anoff-axis region thereof, and the image-side surface 882 of the eighthlens element 880 includes three inflection points and a critical pointin an off-axis region thereof.

The filter 890 is made of a glass material and disposed between theeighth lens element 880 and the image surface 895 and will not affect afocal length of the photographing optical lens assembly.

The detailed optical data of the 8th embodiment are shown in Table 15and the aspheric surface data are shown in Table 16 below.

TABLE 15 8th Embodiment f = 6.89 mm, Fno = 2.00, HFOV = 46.6 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano 2000.000 1 Ape. Stop Plano −0.511 2 Lens 1 3.025 ASP0.622 Plastic 1.545 56.1 11.20 3 5.563 ASP 0.315 4 Lens 2 7.521 ASP0.335 Plastic 1.660 20.4 −18.63 5 4.584 ASP 0.378 6 Stop Plano −0.329 7Lens 3 6.069 ASP 0.705 Plastic 1.544 56.0 10.03 8 −52.094 ASP 0.613 9Lens 4 −86.660 ASP 0.386 Plastic 1.679 18.4 156.74 10 −47.858 ASP 0.47011 Lens 5 −3.965 ASP 0.452 Plastic 1.582 30.2 −14.87 12 −7.621 ASP 0.11813 Lens 6 3.058 ASP 0.598 Plastic 1.544 56.0 18.04 14 4.135 ASP 0.836 15Lens 7 4.367 ASP 0.648 Plastic 1.544 56.0 9.82 16 22.689 ASP 0.680 17Lens 8 14.239 ASP 0.663 Plastic 1.544 56.0 −5.57 18 2.458 ASP 0.800 19Filter Plano 0.210 Glass 1.517 64.2 — 20 Plano 0.226 21 Image Plano —Reference wavelength is 587.6 nm (d-line). Effective radius of Surface 6(Stop 801) is 1.890 mm.

TABLE 16 Aspheric Coefficients Surface # 2 3 4 5 7 8 k =  5.1240E−01−3.2523E+00 −2.2963E−01 −1.0809E+01 −2.8994E−01 2.8286E+01 A4 =−1.9122E−03  8.4051E−04 −1.7817E−02 −4.1519E−03  2.5033E−04 1.8091E−04A6 = −7.8891E−04 −8.1092E−05  1.7143E−03  2.0628E−03  6.7785E−03−2.6172E−03  A8 =  1.3285E−05 −9.0027E−04 −5.0970E−04 −7.5996E−03−1.2668E−02 4.1259E−03 A10 = −6.3881E−05  3.3892E−04  6.4719E−04 6.6650E−03  9.4276E−03 −3.0549E−03  A12 = −1.7461E−05 −1.6097E−04−4.4314E−04 −2.9479E−03 −3.7084E−03 1.3133E−03 A14 =  2.9329E−05 1.5538E−04  7.0160E−04  7.6343E−04 −3.1137E−04  A16 = −1.7891E−05−6.7591E−05 −6.2784E−05 3.0938E−05 Surface# 9 10 11 12 13 14 k = 9.9000E+01 9.9000E+01 −1.3206E−02 −4.7034E−02 −1.2328E+01 −4.2706E+00A4 = −1.1853E−02 4.3672E−03  5.5086E−02  1.6929E−02  9.7000E−03−2.3495E−02 A6 = −4.9134E−03 −1.3396E−02  −4.0114E−02 −2.0633E−02−2.7388E−03  1.3422E−02 A8 = −7.2475E−04 7.4244E−03  1.9688E−02 8.3182E−03  5.9911E−04 −4.0119E−03 A10 =  6.4047E−04 −3.7372E−03 −6.2605E−03 −2.0074E−03 −2.2110E−04  6.6968E−04 A12 = −2.0271E−041.2927E−03  1.2915E−03  3.2669E−04  4.5487E−05 −6.9592E−05 A14 = 1.2319E−05 −2.8430E−04  −1.6901E−04 −3.3330E−05 −5.1185E−06  4.5676E−06A16 =  2.3173E−06 3.5159E−05  1.3010E−05  1.8500E−06  3.2137E−07−1.8240E−07 A18 = −1.7582E−06  −4.5998E−07 −4.1875E−08 −1.0517E−08 4.0169E−09 A20 =  1.3926E−10 −3.7215E−11 Surface # 15 16 17 18 k =−1.0075E+00  7.9337E+00  8.8355E−02 −6.2829E+00 A4 =  2.8572E−03 2.5635E−02 −4.7181E−02 −2.2958E−02 A6 = −5.1299E−03 −7.7153E−03 9.6238E−03  4.0298E−03 A8 =  9.1519E−04  8.8650E−04 −1.0377E−03−4.2822E−04 A10 = −1.5530E−04 −5.4698E−05  6.8024E−05  2.9076E−05 A12 = 1.8739E−05  1.8634E−06 −2.8654E−06 −1.3001E−06 A14 = −1.3068E−06−2.8805E−08  7.8406E−08  3.7810E−08 A16 =  5.0822E−08 −1.0693E−10−1.3523E−09 −6.8382E−10 A18 = −1.0310E−09  9.3579E−12  1.3391E−11 6.9641E−12 A20 =  8.5229E−12 −8.1721E−14 −5.8157E−14 −3.0491E−14

In the 8th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 8th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 15 and Table 16as the following values and satisfy the following conditions:

8th Embodiment f [mm] 6.89 R9/f −0.58 Fno 2.00 (R15 + R16)/(R15 − R16)1.42 HFOV [deg.] 46.6 f/f1 0.62 V5 30.2 f/f2 −0.37 V6 56.0 f/f3 0.69(Vi/Ni)min 10.98 f/f4 0.04 Vmin 18.4 f/f5 −0.46 ΣCT/ΣAT 1.43 f/f6 0.38CT1/CT3 0.88 f/f7 0.70 CTmax/CTmin 2.10 f/f8 −1.24 (T12 + T34)/T23 18.94f/ImgH 0.87 (T12 + T34 + T45 + 17.45 f1/f3 1.12 T67 + T78)/(T23 + T56)(T67 + T78)/CT7 2.34 f3/f7 1.02 (T67 − T78)/(T67 + T78) 0.10 |f7/f8|1.76 TD/T45 15.94 ImgH/BL 6.42 TD/(T67 + T78) 4.94 Y82/Y11 3.68 TL [mm]8.73 Yc62/Yc61 1.09 TL/f 1.27 Yc72/Yc71 1.11 TL/ImgH 1.10 Yc82/Y82 0.44R5/R6 −0.12

9th Embodiment

FIG. 18 is a three-dimensional schematic view of an imaging apparatus 10according to the 9th embodiment of the present disclosure. In FIG. 18 ,the imaging apparatus 10 of the 9th embodiment is a camera module, theimaging apparatus 10 includes an imaging lens assembly 11, a drivingapparatus 12 and an image sensor 13, wherein the imaging lens assembly11 includes the photographing optical lens assembly of the presentdisclosure and a lens barrel (its reference number is omitted) forcarrying the photographing optical lens assembly. The imaging apparatus10 can focus light from an imaged object via the imaging lens assembly11, perform image focusing by the driving apparatus 12, and generate animage on the image sensor 13, and the imaging information can betransmitted.

The driving apparatus 12 can be an auto-focus module, which can bedriven by driving systems, such as voice coil motors (VCM), microelectro-mechanical systems (MEMS), piezoelectric systems, and shapememory alloys. The photographing optical lens assembly can obtain afavorable imaging position by the driving apparatus 12 so as to captureclear images when the imaged object is disposed at different objectdistances.

The imaging apparatus 10 can include the image sensor 13 located on theimage surface of the photographing optical lens assembly, such as CMOSand CCD, with superior photosensitivity and low noise. Thus, it isfavorable for providing realistic images with high definition imagequality thereof.

Furthermore, the imaging apparatus 10 can further include an imagestabilization module 14, which can be a kinetic energy sensor, such asan accelerometer, a gyro sensor, and a Hall Effect sensor. In the 9thembodiment, the image stabilization module 14 is a gyro sensor, but isnot limited thereto. Therefore, the variation of different axialdirections of the photographing optical lens assembly can adjusted so asto compensate the image blur generated by motion at the moment ofexposure, and it is further favorable for enhancing the image qualitywhile photographing in motion and low light situation. Furthermore,advanced image compensation functions, such as optical imagestabilizations (OIS) and electronic image stabilizations (EIS), can beprovided.

10th Embodiment

FIG. 19A is a schematic view of one side of an electronic device 20according to the 10th embodiment of the present disclosure. FIG. 19B isa schematic view of another side of the electronic device 20 of FIG.19A. FIG. 19C is a system schematic view of the electronic device 20 ofFIG. 19A. In FIG. 19A, FIG. 19B and FIG. 19C, the electronic device 20according to the 10th embodiment is a smartphone, wherein the electronicdevice 20 includes three imaging apparatus 10, 10 a, 10 b, a flashmodule 21, a focusing assisting module 22, an image signal processor(ISP) 23, a user interface 24 and an image software processor 25. Whenthe user captures images of an imaged object 26 via the user interface24, the electronic device 20 focuses and generates an image via at leastone of the imaging apparatus 10, 10 a, 10 b while compensating for lowillumination via the flash module 21 when necessary. Then, theelectronic device 20 quickly focuses on the imaged object according toits object distance information provided by the focusing assistingmodule 22, and optimizes the image via the image signal processor 23 andthe image software processor 25. Thus, the image quality can be furtherenhanced. The focusing assisting module 22 can adopt conventionalinfrared or laser for obtaining quick focusing, and the user interface24 can utilize a touch screen or a physical button for capturing andprocessing the image with various functions of the image processingsoftware.

According to the 10th embodiment, the imaging apparatus 10 a, 10 b canbe the same as or similar to the imaging apparatus 10 according to the9th embodiment and will not be described again herein. In detail, theimaging apparatus 10 a, 10, 10 b of the 10th embodiment can berespectively a telephoto imaging apparatus, a wide-angle imagingapparatus and a general imaging apparatus (which is between telephotocharacteristic and wide angle characteristic), or other kinds of imagingapparatus, and the present disclosure is not limited thereto.

11th Embodiment

FIG. 20 is a schematic view of an electronic device 30 according to the11th embodiment of the present disclosure. The electronic device 30 ofthe 11th embodiment is a wearable device. The electronic device 30includes an imaging apparatus 31. The imaging apparatus 31 can be thesame as that of the 9th embodiment, and will not be repeated herein.

The foregoing description, for purpose of explanation, has beendescribed with reference to specific embodiments. It is to be noted thatTables show different data of the different embodiments; however, thedata of the different embodiments are obtained from experiments. Theembodiments were chosen and described in order to best explain theprinciples of the disclosure and its practical applications, to therebyenable others skilled in the art to best utilize the disclosure andvarious embodiments with various modifications as are suited to theparticular use contemplated. The embodiments depicted above and theappended drawings are exemplary and are not intended to be exhaustive orto limit the scope of the present disclosure to the precise formsdisclosed. Many modifications and variations are possible in view of theabove teachings.

What is claimed is:
 1. A photographing optical lens assembly comprisingeight lens elements, the eight lens elements being, in order from anobject side to an image side along an optical path: a first lenselement, a second lens element, a third lens element, a fourth lenselement, a fifth lens element, a sixth lens element, a seventh lenselement and an eighth lens element; wherein each of the eight lenselements has an object-side surface towards the object side and animage-side surface towards the image side; wherein the first lenselement has positive refractive power; the object-side surface of thesecond lens element is convex in a paraxial region thereof; the thirdlens element has positive refractive power; the image-side surface ofthe fifth lens element is convex in a paraxial region thereof; theobject-side surface of the sixth lens element is convex in a paraxialregion thereof; wherein at least one of the object-side surfaces and theimage-side surfaces of the eight lens elements comprises at least onecritical point in an off-axis region thereof; wherein an axial distancebetween the sixth lens element and the seventh lens element is T67, anaxial distance between the seventh lens element and the eighth lenselement is T78, an axial distance between the object-side surface of thefirst lens element and the image-side surface of the eighth lens elementis TD, a curvature radius of the object-side surface of the eighth lenselement is R15, a curvature radius of the image-side surface of theeighth lens element is R16, an Abbe number of the sixth lens element isV6, and the following conditions are satisfied:2.0<TD/(T67+T78)<6.3;0.30<(R15+R16)/(R15−R16);35.0<V6<60.0.
 2. The photographing optical lens assembly of claim 1,wherein the axial distance between the sixth lens element and theseventh lens element is T67, the axial distance between the seventh lenselement and the eighth lens element is T78, the axial distance betweenthe object-side surface of the first lens element and the image-sidesurface of the eighth lens element is TD, the curvature radius of theobject-side surface of the eighth lens element is R15, the curvatureradius of the image-side surface of the eighth lens element is R16, andthe following conditions are satisfied:4.0<TD/(T67+T78)<6.0; and0.70<(R15+R16)/(R15−R16)<2.0.
 3. The photographing optical lens assemblyof claim 1, wherein an Abbe number of the fifth lens element is V5, andthe following condition is satisfied:15.0<V5<45.0.
 4. The photographing optical lens assembly of claim 1,wherein a central thickness of the first lens element is CT1, a centralthickness of the third lens element is CT3, and the following conditionis satisfied:0.65<CT1/CT3<1.4.
 5. The photographing optical lens assembly of claim 1,wherein an axial distance between the first lens element and the secondlens element is T12, an axial distance between the second lens elementand the third lens element is T23, an axial distance between the thirdlens element and the fourth lens element is T34, an axial distancebetween the fourth lens element and the fifth lens element is T45, anaxial distance between the fifth lens element and the sixth lens elementis T56, the axial distance between the sixth lens element and theseventh lens element is T67, the axial distance between the seventh lenselement and the eighth lens element is T78, and the following conditionis satisfied:8.0<(T12+T34+T45+T67+T78)/(T23+T56)<30.
 6. The photographing opticallens assembly of claim 1, wherein an axial distance between theobject-side surface of the first lens element and an image surface isTL, a maximum image height of the photographing optical lens assembly isImgH, and the following condition is satisfied:0.80<TL/ImgH<1.20.
 7. The photographing optical lens assembly of claim1, wherein a focal length of the first lens element is f1, a focallength of the third lens element is f3, and the following condition issatisfied:0.40<f1/f3<1.5.
 8. The photographing optical lens assembly of claim 1,wherein the image-side surface of the first lens element is concave in aparaxial region thereof; the image-side surface of the second lenselement is concave in the paraxial region thereof; the seventh lenselement has positive refractive power; a distance between a criticalpoint of the object-side surface of the sixth lens element and anoptical axis is Yc61, a distance between a critical point of theimage-side surface of the sixth lens element and the optical axis isYc62, and each of the object-side surface and the image-side surface ofthe sixth lens element comprises at least one critical point in theoff-axis region thereof satisfying the following condition:0.80<Yc62/Yc61<1.3.
 9. The photographing optical lens assembly of claim1, wherein the object-side surface of the third lens element is convexin a paraxial region thereof; the eighth lens element has negativerefractive power; half of a maximum field of view of the photographingoptical lens assembly is HFOV, a maximum distance between an opticallyeffective area of the image-side surface of the eighth lens element andan optical axis is Y82, a maximum distance between an opticallyeffective area of the object-side surface of the first lens element andthe optical axis is Y11, and the following conditions are satisfied:30.0 degrees<HFOV<65.0 degrees; and2.0<Y82/Y11<5.0.
 10. An imaging apparatus, comprising: the photographingoptical lens assembly of claim 1; and an image sensor disposed on animage surface of the photographing optical lens assembly.
 11. Anelectronic device, comprising: the imaging apparatus of claim 10.